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Mod | | | Forums66 Topics128,111 Posts1,056,244 Members48,437 | | 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 2016 Posts: 1,989 'Bolter | | 'Bolter Joined: Feb 2016 Posts: 1,989 | My '57 with the 283 V8 has the factory governor, it is a combination of centrifugal and vacuum, the distributor has no vacuum advance. Spec timing is 4 degrees before, I don't know what the total timing is but I never get any preignition noise. Some 1974 trucks had HEI from the factory, my new 1974 GMC K1500 with 350 4 bbl 4 speed had HEI, I bought it off the dealer lot when I was a senior in high school.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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