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Click on image for the lowdown. 
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| | | Forums66 Topics128,030 Posts1,055,428 Members48,422 | | 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!
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For helping keep this great
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Dec 2006 Posts: 1,464 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 1,464 | Hi Jimmie; Your info is backwards. BB below the pointer is advanced and above is retarded.
You'll get best mileage and performance when your timing is advanced as far as your engine will allow. That means, setting the initial timing "on the BB" then advance the distributor slightly CCW (this will advance the timing) and take it for a drive. Continue this little drill until it starts to ping under load. Then back it down slightly until the pinging goes away.
When I do this to mine, I can barely see the BB in the timing hole well below the pointer. | | |
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