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Mod | | | Forums66 Topics128,086 Posts1,056,099 Members48,434 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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| | | | Joined: Nov 2005 Posts: 43 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2005 Posts: 43 | Is it going to fit I have a chance to pick one up.
Jdude
| | | | | Joined: Nov 2000 Posts: 1,399 Camp Commandant | | Camp Commandant Joined: Nov 2000 Posts: 1,399 | | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | No chance of fitting a 6V71 unless it's behind the cab. | | | | | Joined: Apr 2003 Posts: 942 'Bolter | | 'Bolter Joined: Apr 2003 Posts: 942 | Not only size, but weight would also be a problem. They weigh about 500 or 600 lbs more than a 6V-53. Or about 4 times as heavy as an original engine in one.
Bill
'60-'72 Chev/GMC Fan
GMC 9500 Fan
Detroit Diesel Fan
| | | | | Joined: Mar 2012 Posts: 60 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2012 Posts: 60 | I had a 3v71 I sold last year, because I didn't picture it in a truck. Now I see they were actually in GMC trucks. What kind of gearing was used? Were they as slow as I'm expecting? I have 87 GMC Brigadier with a 6v71 and it has a 12000lb front axle(need to sell it). The 6v71 is one solid chunk.
Stretch your frame and sheet metal or maybe move the cab back a couple of feet. Might be easier to add 600 to that 350 and restore a 950. I went to a truck show last month that had some beautiful GMC950's with 6v71 engines. | | | | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | The 371 was offered in the 450 series in 1952 and 53. And possibly some other years. They never really caught on because they were expensive, heavy and had less power than a 302 gas. And most operators of medium trucks did not have facilities to maintain the Diesels. I remember a couple of them being around when I was young and the owners were very disappointed in them. | | | | | Joined: Feb 2004 Posts: 29,795 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,795 | The 71-series engines are huge, whether they're inline or V-type. What the name stands for is "71 cubic inches per cylinder", so a 6V-71 is a 426 cubic inch engine that fires on every upstroke of the piston because it's a 2-cycle. It would have the same number of power impulses per mile as an 852 cubic inch 4-stroke. That's why the older Detroit engines sound like they're running so fast- - - - -they're making as much noise as a 4-stroke running twice the RPM.
A 53-series engine has 53 cubic inches per cylinder, so it's smaller and lighter. They're much more suitable for medium-duty truck use, but they're still big, heavy, and noisy. The term "screamin' Jimmy" is well-deserved, especially when the howl of the blower gets factored into the equation.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Nov 2005 Posts: 43 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2005 Posts: 43 | What came in the 2ton jimmys for diesel power? I would like a 4/53 silver king but the guy has that 6-71 and a10 speed hopefully reasonable.
Jdude
| | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | A 2 ton Chevy or GMC had the option of a 4-53 for a number of years ending in 1980. (Starting no earlier than 1958; the introduction of 53 series, not sure first year for trucks)
There were some 3-53's put in GM trucks as conversions from Detroit, they made a housing set for the 3 and 4 cyl that was a bolt in swap for gas engines. I've also seen some step vans that look to have come with the 3-53 stock.
Grigg | | | | | Joined: Nov 2005 Posts: 43 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2005 Posts: 43 | Thanks I can look more when the war department settles down about another truck in the driveway. Lol
Jdude
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