Quote: I dont run vacuum advance. only mechanical.
ditto!
I think vacuum advance in a steet driven hot rod or strip operated car is meaningless anyway unless you frequently drive long distances.
I've gotten 14mpg out of a warmed over 440 doing 70mph with 3.23 gears and mechanical advance only. Better than I ever thought I'd get!
I can't tell you how many Mopar electronic distributors I've gone through for friends because they just can't get their car to run properly! It's not like it's a black art, they just treat it like it is!
Stuck weights, broken springs, and nasty corroded internals are all par for the course.
