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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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#34915 04/29/2002 10:46 PM | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | PS- timing always advances with vacuum and retards with less vacuum. In other words, as the load on the engine increases, it drops the vacuum and the timing needs to retard. Your problem is probably the transmission controlled advance distributor curve. You need a distributor from a manual transmission truck to match your carb and you should be set.
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