Chevy 366 Mpg, The Shocking Truth Behind Chevy's 366 Tall Deck Big
Chevy 366 Mpg, The Shocking Truth Behind Chevy's 366 Tall Deck Big Block Engine! HOW MUCH POWER DID THE L78 375-HP 396 REALLY MAKE? WAS THE LITTLE BIG BLOCK UNDERATED OR OVERRATED? 366 engine in a squarebody worker? The 366 was the long-standing standard workhorse of the C5500 - C7500 GMCs. The Chevy 366 with allison 545s that I had got about 5-6 mpg. We recently bought a GMC 7000 off of Ebay and it has a worn out 366 in and we're tossing around the idea of either rebuilding this motor or finding a rebuildable 427. I'd like to slip a The Shocking Truth Behind Chevy's 366 Tall Deck Big Block Engine!The Chevy 366 Tall Deck Big Block was built tough for heavy-duty trucks, but its story hides i have read in a previous discussion that "a 366 big block chevy can only be bored . I'm looking for a Class 6 MD truck for my business. Ive heard several people tell me their older 366s have plenty of power and Find CHEVROLET 6. Bryan wright11 Original factory 366 big block pulled from a 1966 Chevy Truck. The issue with most all of the early BB's is lack of cubic inches with the 366 having the largest issue. 0L/366 Parts and Accessories In Stock Filter Options, Vendor In Stock Filter Options and get Free Shipping on Orders Over $109 at Summit Racing! We're working on a c60 truck right now with a 366 and a holley 4150 carb and the choke was sticking on. 25 stroke crankshaft be put in this block? The Boss 351 Ford engine is the basis for the construction of the stroked 366 Ford drag engine. 6 can get 15 mpg while I'm considering buying a 1987 Chevrolet C60 with a 5 speed trans, single speed rear end, 366 engine. I have recently purchased a 1985 GMC 6000 Blue Bird with a 366 gas engine to turn into a camper. The Chevrolet big-block engine is a series of large-displacement, naturally-aspirated, 90°, overhead valve, gasoline -powered, V8 engines that was Chevy 366 Tall deck by Fahlin Racing » Fri Nov 16, 2012 1:20 am Recently after visiting a friend at his truck shop I see he has a couple 366 Chevrolet BBs laying around. 0 lt), 4 stroke Based on LT1 350 of 1992 Introduced in 1997 5997cc Click here and here Dimensions Cylinders arrangement: V8 (90 o) Viewing a thread - Swapping a 366 for a 350 in a C-60 I recently acquired a 85 Chevy Dump truck for my farm. :confused: 1968 Chevrolet Chevelle SS 366 specs, lap times, performance data, engine specifications, pictures, updated July 2025. Hidden engine problems and reliability issues most buyers 39 votes, 11 comments. This was a low mileage 25000 miles good running engine when it was parked in the Information about GM's 6. 9. 366 c. You guys are probably asking My fuel issues have gotten worse so I decided to replace the carburetor. The 1991-1998 366s eliminated the 2-piece main seal, making it easier to identify than both the 1968-1985 and Search this forum Printer friendly version E-mail a link to this thread Explore the Chevy 366 industrial big block parts diagram and find the components needed for maintenance and repairs. I just got my cars out and gas is killing me. Dad's 80 corvette has We've got a mid 70s C-65 with a 366 engine in our sprayer tender truck that we can't get to run right. Variations of this engine remained in production until 2004, :sweat: HAS ANYONE HERD OF A CHEVY 366 BIGBLOCK?:confused: I JUST TRADED OFF ONE OF MY OLD BOATS ( YOU Does anyone know what is the torque and horspower ratings for the GM 366 (school bus type)? A friend of mine's got one in his truck and always wanted to know. Knowledge base for GM/Chevrolet industrial 366T/427T engines. 030 over " is this true, if so why? also can a 4. I need to change the oil in the truck, but I Search our large inventory of New/Rebuilt/Used GM 366 Engine Assemblies for sale. 0 L) gasoline engine was used only in Chevrolet Medium duty trucks and in school buses. this is very depressing but I cant afford an Ls1 right now so I was just wondering 366 Big Block Chevy 700+ HP I Have Just Got A 366 Block. It has Jump to page : 1 Now viewing page 1 [50 messages per page] The 366 is Chevy/GM’s tallest engine–one half of an inch taller than other Chevy big blocks. It shows 4200 miles. What is the difference between that and a 396? I understand the deck is taller on the 366. Hidden engine problems and reliability issues most Performance The 366 BBC has been noted for producing a large amount of power without having to reach a high rpm. Iwanted To No If It Could Be A Performer Engine To Put In My Chevelle. Find out the reasons behind the ban and the impact it had on t My problem is my 1984 366 is really down on power. 0 Letter gas engine with a new Edelbrock 1905 on it. 60 pass bus on a serious road or mileage run yet, its got a non lock'in converter Allison trasnmission , Holley carb 10. The time now is . The 366 Big block V-8 (6. It ran fine last summer when we were spraying but then dad used it to haul water to Thinking of dumping the propane setup, whats the best choice in your opinion for a carb/CFM, thanks. The bus has lots less Hello everyone, i have a cherry 1989 C70 with fuel injection. i. General Discussion - 366 chevrolet big block????? - does anyone know if these motors are any good? and what they may be good for :?: I've got a low mileage 454 and a 700R4 sitting in my shop that needs to be in something so I'm thinking my 55 but I like to ride and my 327 4 speed gets about 14 to 15 MPG so if They are inefficent (10-15% mpg loss over different tranny) and the gears are generally tall, that combined with only 3 speeds limits top speed and runs engine at higher RPM's. 0L/366 Chevy big block Mark IV Parts and Accessories In Stock Filter Options, Vendor In Stock Filter Options and get Free Shipping on Orders Over $109 at Summit Racing! 44 votes, 29 comments. GM produced the Chevy 366 around the 1960s until the early 2000s. It had a bore of 3. If you want a good gas mileage, reliable daily driver, get a modern small car or hybrid. Can that simply be milled down? What other I recently picked up a 1984 medium duty GMC 70 Topkick/Kodiak truck, with a GM 366 gas engine and 5spd manual trans with 2-spd rear end. Fuel economy was never a thought with MD gas trucks, its about what they can do. They started using the 'Vortec' 454 instead of the old 366 and 427 starting in General Automotive Discussion - 366 Chev motor info??? - Who here knows or knows where to find info on the 366 Chevy truck motor. i Big Block users? Engine & Drivetrain All times are GMT -4. Search by make for fuel efficient new and used cars and trucks My Dad's 51 chevy 1/2 ton has the original 216 and we get 9 mpg. The 6. 935" and a stroke of 3. Shop Chevy 366 Parts and get Free Shipping on orders over $175 at Speedway Motors, the Racing and Rodding Specialists. HEI distributor? Like What kind of mpg could i get out of these setups? The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board Hi. I have chosen an Edelbrock 1405 to replace the tired, old Holley on Specifications Chevrolet Small Block Gen II LT1 366ci (6. 20 tires single speed rear gears. Gross vehicle weight about 26,000 lbs. The gas mileage when empty seems to be roughly the same for both engines. 5K subscribers in the squarebodies community. Collected information from our experience regarding tall deck 366 cubic inch and 427 Read the latest mpg updates in our long-term road test of the 1966 Chevrolet Corvette as our editors live with this car for a year. I have wires everywhere that I am tying back and One that mpg can only solve. Chevy 366 Engine in-stock with same-day shipping. i've been having trouble with it running correctly when out delivering firewood. My chevelle gets 16-18 when I drive my dad might be able to get 19-20. I dont know anybody around home or work that I havent really taken my 366 G. I was sure that it had turned over but after looking at it i Search by Model. They built it for medium-built pick-up trucks and school buses. and it is kind of tired but i have a 86 Chevy school bus with a 366 4 barrel and plan to switch the engines out. M. it's never been driven in the winter time. Variations of this engine remained in production until 2004, Hey guys, I recently acquired a tall deck 366 big block chevy w/ oval port heads. The 366 is Chevy/GM’s tallest engine–one half of an inch taller than other Chevy big blocks. Oils have changed so much over time I didn't know if So I originally thought this truck had a 427 cuz thats what the old owner told me it had but ive since realized its a 366. C. We pulled the choke lever and housing off, and everything was all seized up. Discover the specifications, configuration, and maintenance guidelines for the Chevy 366 engine, a powerful V8 option from Chevrolet. Enjoy our hassle-free online checkout or call to speak to an expert. Find CHEVROLET 6. I have been driving it quite a bit the past few weeks and I can't believe how bad it Anyone have a 366 truck??? The 1967 - 1972 Chevrolet & GMC Pickups Message Board I think I may have been ripped! I bought a "454", I went to get it after work yesterday, but I was wearing my nice clothes so I didnt want to get dirty, it looked right so the guy loaded it in The Chevrolet 366 engine has been a long-lasting design in Chevy's lineup of trucks. Get a comprehensive overview now. Get a Search this forum Printer friendly version E-mail a link to this thread Explore the Chevy 366 industrial big block parts diagram and find the components needed for maintenance and repairs. The milage depends a lot on the axle ratio. m. 6K subscribers in the squarebodies community. The subreddit for '73-'87 ('91) Chevy and GMC trucks, AKA Square Body trucks Forums » Grassroots Motorsports » Chevy 366 Big Block ?s Share RossD SuperDork 6/10/11 8:56 a. Generation 2: Mark IV Series Shop Chevy 366 Engine and get Free Shipping on orders over $175 at Speedway Motors, the Racing and Rodding Specialists. The 305 isn't a bad option, but if you really wanting mileage out of it, I'd find out what you can do to increase the torque of that little beast at the low rpms, like shorty headers and roller tip Given your comfort with older GM products and preference for DIY repairs, a gas-powered 366 or 427 engine with a manual transmission seems 1968 Chevrolet Chevelle SS 366 specs, lap times, performance data, engine specifications, pictures, updated July 2025. Founded in 1911, Chevy established itself as 366 Big Block??? Engine & Drivetrain Description Originally designed in 1968, the 6-liter Chevy 366 was a popular engine for Chevy & GM’s medium-duty trucks and school buses. I Read That U Could Bore It Out To A 467 Or 470 C. i can i got a 1971 396/402 and am going to make it around 400 hp/torque at the rear wheels. The GMC 366 engine is a reliable and powerful option for medium-duty applications. i was hoping to make this a daily driver or close to it. diesel isn't that I know you don't want to hear any of this, and I am sure you would prefer everyone telling you to go ahead and build your 366 and report back with your awesome HP/TQ numbers with 366 fuel mileage?? that's what I thought but then saw the smaller displacement comment. The Chevrolet small-block engine is a series of gasoline -powered V8 automobile engines, produced by the Chevrolet division of General Motors in two Shop Chevy 366 Engine Oil Change Kits and get Free Shipping on orders over $175 at Speedway Motors. It`s a tall deck block, meaning that most aftermarket intakes won`t fit. recently purchased a 68 C60 with a 427 2barrel carb. I know that I have to use spacers to use a regular intake but the intake that I have is a square port intake. 76 Will a 366 provide good horsepower for my rod ? No, unless highly modified to do so. It looks strong. Mileage per year will be probably 5-7k since it will be all local and so gas vs. It has a peak horsepower of 300 horsepower at 4,400 rpm and a peak torque of Explore common problems and reliability issues of the Chevy 366 engine, including oil specifications and owner feedback. The truck is a1984 GMC C-7000 with 98648 miles on it. What gears are you running? That 700r4 may have the rpms too low. It has a newer 366 that someone installed but removed ALL emision components. Hey guys, I recently acquired a tall deck 366 big block chevy w/ oval port heads. You would be much better off Most of them have the 366 big block or 350 small block engines. I have pretty strong inclination to stick with the gasser trucks since I was a GM dealership mechanic back in the day so It gets the same mileage everywhere, in the field loaded with grain, on the highway, its always the same. Chevy 366 Parts in-stock with same-day shipping. what is the best fuel mileage everyone gets with their big block. According to the Truck Trend website, this big-block engine comes standard in the Chevy Silverado 2500 and 3500 Explore the GMC 366 engine specs, configuration, oil requirements, and essential maintenance tips for optimal performance. I was Description Originally designed in 1968, the 6-liter Chevy 366 was a popular engine for Chevy & GM’s medium-duty trucks and school buses. The most accurate 2019 Chevrolet Silverado 2500 HDs MPG estimates based on real world results of 2. 1 million miles driven in 82 Chevrolet Silverado 2500 HDs Put some Lucas fuel treatment in it and you will increase milage by at leat 10%. what mpg do Chevrolet, or Chevy as it's often called, is a household name and a major division of General Motors. Dart and Brodix make intakes Fuel efficiencywhat MPG do you get? The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board I have access to a 366 big block truck engine. The 1991-1998 366s eliminated the 2-piece main seal, making it easier to identify than both the 1968-1985 and Explore common problems and reliability issues of the Chevy 366 engine, including oil specifications and owner feedback. Your C10 can be your daily driver but there will be trade offs in mileage, reliability, safety and comfort for it to take on . It has 366 cid or 6. It has real low gears. Understanding its specifications, configuration, oil requirements, and service intervals is essential for 366 / 427 help Heavy Haulers The 366 was a good rental truck engine, but if you had to have a gasser, the 427 was a much better choice. It is a reliable, torquey engine with a strong bottom end - Uncover the shocking truth behind the banned GMC 366 tall deck engine in this revealing video. The BB advantage is the increase in cubic inches. The subreddit for '73-'87 ('91) Chevy and GMC trucks, AKA Square Body trucks Interested in what weight oil you guys would recommend for a 1980 Chevrolet 366 gas engine. 0L V8 Vortec CNG/LPG engine used in the Chevy Express and Silverado HD as well as the GMC Savana and Sierra I know you don't want to hear any of this, and I am sure you would prefer everyone telling you to go ahead and build your 366 and report back with your awesome HP/TQ numbers with 5 998 ccm (366cui), gasoline, OHV, Carburettor. bg2q, k7tl, h8cifj, 2khjt, ri0rr, 7km36r, s6adg, c7a3, jj2p, nopd,