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| | | Forums66 Topics128,190 Posts1,057,339 Members48,469 | | 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!
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#16631 01/29/2004 4:10 AM | Joined: Jul 2003 Posts: 101 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2003 Posts: 101 | My GMC 302 six starts very easy but pings on acceleration. Does this mean it is too far advance or retarded. The motor is not broken in so I'm worried about damage to the cylinder walls. I guestimated the RPMs when setting the timing. Do I need a tach to get it right?
And what the hey is a Petronix?
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