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Click on image for the lowdown. 
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| | | Forums66 Topics128,049 Posts1,055,684 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!
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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: Dec 2007 Posts: 79 'Bolter | | 'Bolter Joined: Dec 2007 Posts: 79 | Trying to build a 1949 3100 putting in a 235 got a bellhousing with the truck. My problem I don't know if , it's a car or truck . I found out the bolt pattern is different. What I have looks like 8 3/8" center to center on the top holes and 9 1/8" on the botttom .I'm talking about looking for a 3 speed transmission . What case number would indicate a truck transmission ? Or what are the measurment for a truck transmission ? Thanks | | | | | Joined: Mar 2010 Posts: 1,660 Curmudgeon | | Curmudgeon Joined: Mar 2010 Posts: 1,660 |
"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."
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