Anyone ever disassemble a distributor - need help

This one of the places where Chrysler, Ford, AMC and the various GM engines differ enough that the 'hot setup' for one doesn't apply to another.
The pistons dwell for different lengths of time (crank degrees) at the top, the cylinder heads and pistons have different combustion characteristics, etc. As a result the rate of burn, and the time available to develop the most effective pressure through angles of maximum leverage are not going to be the same as brand X or Y.