[Richard in Florida]

Originally Posted by Ronnie

The amount of total mechanical advance in degrees is achieved by the length of the advance slot as well as a bushing on the advance pin inside the dist.(shorter the slot less total advance)

This limits you to the few bushings you can buy plus whatever others you can turn out on your mini-lathe.

During our quest for the most flexible converted GM distributor I came up with an idea that works great. By replacing the bushing with a 4-40 setscrew, you have much greater advance range adjustment, AND you can set it anywhere you want.