I think Stuart pretty well covered it. If your ground cable goes to the frame make shure the ground strap from the frame to engine is heavy & connections are good. The engine tightens up when warm & the starter has more resistance. You might try setting the timing back a little.

They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
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