Quote:
Originally Posted by mlo714
If I stomp on the gas it wont do it....its only under load at light-mid throttle.
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This sounds to me like a vacuum advance issue. Unhook the advance, and then go for a drive. A lot of distributors have lots of vacuum advance (like 24 degrees) to make up for a really weak timing curve. If you set the initial timing for more advance than stock, the vacuum can may push it too far during light throttle, high vacuum, driving. If this is the case, you simply need to limit the vacuum advance. About 10 degrees is a good number for a performace type of timing curve.