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Mod | | | Forums66 Topics128,091 Posts1,056,034 Members48,433 | | 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
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Feb 2004 Posts: 29,792 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,792 | Your "Motors Manual" is wrong. The federal-Mogul engine bearing specification manual #115, dated 1982 which supercedes the 1980 edition lists the same crankshafts from 1956-63 for the 235 AND 261 engines. They have the following forging numbers:
3701486
3701488
3701488A
3770327
All the above crankshafts use the same rod bearings, Federal-Mogul 1950CP, and main bearings, F-M # 960M. THERE ARE NO DIFFERENCES IN MAIN BEARING DIAMETER FOR ALL THESE CRANKSHAFTS.
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!
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