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Click on image for the lowdown. 
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| | | Forums66 Topics128,053 Posts1,055,778 Members48,426 | | 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!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Nov 2000 Posts: 171 Shop Shark | | Shop Shark Joined: Nov 2000 Posts: 171 | Casting # 3731548 # on the right pad front bellow head F1204L , What is it? | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy BILL, the chevy V8 identification site says that 3731548 is a 1957 283 block, actually kind of a rare engine because it has no side mount boses cast into the block, unlike the 58-67 283 blocks, hope that helps. | | | | | Joined: Aug 2005 Posts: 94 'Bolter | | 'Bolter Joined: Aug 2005 Posts: 94 | That is a 1957, 283, Assembled in Flint on Dec 4, 1956. Are you certain the last leter is an "L"? I do not have a code for that suffix. However, it may be a truck code (all I have is codes for passenger cars).
Joe D | | | | | Joined: Nov 2000 Posts: 171 Shop Shark | | Shop Shark Joined: Nov 2000 Posts: 171 | It is suppost to be a 57 truck engine , but on my data plate on my 57 3200 it list 265 V8 and not a 283? , Some where I read that it is suppost to have the "L" =Standard shift, "LA"= hydromatic, "LB"= heavy duty clutch? the engine I have turned out to be a 58 283 ,with the casting for side motor mounts as found in the passenger car. | | | | | Joined: Aug 2005 Posts: 94 'Bolter | | 'Bolter Joined: Aug 2005 Posts: 94 | 3731548 may also be a 1957 265 block, which would have been used only with a standard transmission. (Ref East Coast Chevy) | | | | | Joined: Nov 2000 Posts: 171 Shop Shark | | Shop Shark Joined: Nov 2000 Posts: 171 | | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | F1204L, F= Flint Plant, 1204= Dec 4th assembly date, L= 265, 162 hp, Truck appication w/manual transmission.
Bill Burmeister | | | | | Joined: Nov 2000 Posts: 171 Shop Shark | | Shop Shark Joined: Nov 2000 Posts: 171 | It looks like it maybe the engine I want, THANKS again ,BILL | | |
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