Tranny Recommendations for 600 HP

Anything that will make a 727 explode will make a 904 explode too. Do burnouts in 2nd gear.

600 HP small block? Naturally aspirated?!? That's a pretty pissed-off motor! If you're looking to build "a beast" you're on the right track. But you're also on the right track thinking the high mileage stock 727 in the car now will go away pretty quick if left alone.

The 727 has been on race tracks for 50 years now, there is a pretty good knowledge base for what works, and what lasts. I'd call some of the usual suspects that build race car Torqueflites.

If you're looking for a "tranny guts in a box" type kit this should give you an idea what you'll spend http://smrtrans.tripod.com/smrtransmissionsintro/id51.html Figure at least half the transmission cost for a GOOD converter.