Advancing it may help. It becomes more likely if its currently installed retarded. Verify where it is now first. You may find it in at 115, in which case 2 degrees will make it better, and right! The good news is the lean spot can definitely be tuned out with a few well placed keystrokes. Good luck and report back with results.
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'65 Tempest 467 3650# 11.30@120.31
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