Just adding the finishing touches to my current 30 coupe build. The car is running a 53 8BA Its was a good running engine when it came out of the donor car a few years ago. During the down time the 94 carb gummed up and on first attempt to fire up a few backfires put an end to the powervalve and the carb would run rich.. I bit the bullet and bought a new 97 but this added the next issue , The vacuum port for the Ford Dizzy . As I understand it the carb and dizzy on the 8ba were matched and the dizzy took a ported vacuum from the carb.. Probably getting ahead of myself I invested in a Bubbas Chevy dizzy converted for the 8BA. Bubbas product was spot on but with that dizzy set in the engine and timed Im not so sure the motor is running as sweet as it had been with the Ford Dizzy , even running with the vacuum disconected . I Have zero performance parts on the engine, its 99 % stock with the exception of the new single 97. Ive got to wondering if the Dizzy from Bubbas is to much for the stock motor. Its not a car that will be hammered often if at all, but it will be driven distances and see regular use . With the fixed advance on the Bubbas dizzy will this have an adverse effect on the normal running of the engine ? If I were to refit the Ford dizzy would it be appropriate to take the vacuum from the inlet manifold pretty much as most more modern sources are taken from ? I just got the impression from running the motor with the original dizzy and the bubbas dizzy that the motor runs sweeter at idle than it does with the bubbas and also revs cleaner and smoother . Im pretty sure there is a wealth of knowledge on here covering all angles My buddy has suggested that I retro fit the new dizzy with a vacuum advance mechanism .. kinda defeats the purpose . Im really just seeking advice from anyone who has experience of both dizzys and what tips or tricks they had up there sleeve to get the best from the old motor . Fitting the 97 initially transformed it , I might add that I also swapped the plugs , it was running NGKs and I fitted champions , Ive read anecdotes that say Champions are crap.. and the flatty runs better on NGKs , Can brands make a significant difference ? looking forward to digesting your replies .