[/quote]the base of the stem of the vacuum advance has a notch in it. the length of the notch is how many distributor degrees are in the can. i haven't hit this exactly but about .011"-.012" travel in that notch is one distributor degree. i will limit the travel by gluing a shim on the canister to limit stem travel at the notch. i use permatex ultra gray silicone so i change the shims if i don't like them. i try to limit travel to 6-7 distributor degrees. mech advance has .0154" inches of travel for every one distributor degree. [/quote]

Good info, thanks.


Master, again and still