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| | | Forums66 Topics128,018 Posts1,055,341 Members48,419 | | 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: Sep 2015 Posts: 9 New Guy | | New Guy Joined: Sep 2015 Posts: 9 | Help!
Trying to figure out what engine my truck has?
Casting number on block behind distributor is 333384! | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Px? What kind of truck? Stamped numbers are more useful.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Dec 2002 Posts: 2,548 'Bolter | | 'Bolter Joined: Dec 2002 Posts: 2,548 | If it has the original engine, a 4100 series truck would have a 216ci Thriftmaster engine. 235 was available as an option in the 4400 series trucks. | | | | | Joined: Mar 2004 Posts: 6,212 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,212 | Take a wire brush and look again at your casting number...you gave us 6 numbers when most are 7. Also make sure some of your 3's aren't 8's. As Ed mentioned read the stamped numbers that are on the machined pad near the distributer. Mike B  | | | | | Joined: Jan 2013 Posts: 1,084 'Bolter | | 'Bolter Joined: Jan 2013 Posts: 1,084 | Are there any number letter combinations after that number? Is there another number down lower below fuel pump or to the left. That number doesn't seem to compute with Tim's site. It is an excellent source. Tims site
Allen
Yeah, well, that's just like, you know , your opinion, man - The Dude
1948 Chevy 3600 - goal Original restoration, Current Stage 1 - Disassembly and getting body in primer
1954 GMC 3100 goal Hot Rod, Current Stage 1 - Get body in primer
1931 Ford Model A 5 window Coupe - Old Skool Hot Rod
1945 Ford 2N Tractor - Runs great
1964 Ford 2000 Tractor - Use it every week
1974 Stingray Corvette
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Here are locations of various engine codes. Post the codes you find on your engines and people here will help you ID your engine. Do you have an engine with a 2 bolts through the top of the valve cover or 4-screws at the base of the valve cover? I think 6-cylinder blocks up to around 1940 had 6 digit casting codes, but your numbers do not match the codes I have found on various casting-code lists. If the code you posted is an Engine Serial Number (a code pressed into the block), early Engine Serial Numbers usually had 7 digits until around 1940 (as Mike posted above,). After that, ESLs were a combination of numbers and letters. You most likely have a replacement engine. Post the castings codes so that we can provide better advice/speculation. | | |
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