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Mod | | | Forums66 Topics128,049 Posts1,055,699 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: Feb 2012 Posts: 112 'Bolter | | 'Bolter Joined: Feb 2012 Posts: 112 | I found the different cam casting numbers but was looking to see if there are any specs to see if lift/duration are different between cams.. Is there a "best" one to use for performance?
Old Truck addict
1950 chevy 1 ton napco
1956 gmc 1 ton dually napco
1954 chevy 3/4 ton napco
1957 gmc civil defense napco panel
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