He hung up on me when I wanted my 904 rebuilt to take the 416 power (maybe 550 HP) and retain the kickdown. I knew it would work cause I was already running it.
Kenny at PTC got a kick out of that and did my 904.
bought a 727 pro race reverse manual shift and the ultimate sprag upgrade, and so far i cannot say how pleased i am with it. John built one hell of a transmission for me and the custome service was great!
Is mazzolini still doing transmissions? he used to build a solid 904...
Dont think he is, the guy he used his name was Butch, has retired from building trannies, bummer too, he does a awesome job as well.