I just purchased and manual transmission, quaife dif, B&M short shifter, spec stage 5 clutch, clutch master fly wheel used with less than 200 miles on for $500 plus my auto tranny. I'm concerned about the tranny. I was pricing around they want about $800 to refresh the tranny. The tranny I have was used on a car that was pushing 420hp (so he says) at the wheels. The kid I got it from said he has been through 4 trannys already. The quaife was well worth it and the clutch is like new with no burn marks, fly wheel is fine. Now for piece of mind should I refresh this tranny and rebuild it or go to a junk yard and get a tranny for around $500 that didn't have the HP abuse like the one I have?

run it. if you break it, then replace it. i was pushing 400hp throught my tranny's, never broke a single one, 3.94 or 3.55