[RustyPile]

If the vacuum advance control unit is the source of the distributor cap "lean", more than likely the vacuum advance control is improperly installed. The unit should fit down flat on it's mounting surface. On the rim of the distributor cap near one the screw hooks is a square "nub" that fits in a square notch on the distributor.. If the cap's nub isn't properly aligned and inserted into that notch, the cap will lean...