I work with quite a few guys who have built cars. The general consensus I found from ALL of them was that a poor converter will KILL even the best project. For a little more money, you can get a custom converter. I called Circle D specialties and got a custom billet 9 3/4" 3k stall converter for my car (aod/4r70w) for just under $800 shipped to the house....just my opinion, I only want to have to build this thing 1 time.