Neil Chance is what we use here.... Alot of guys are using the pro torque also...... I think the Chance is a little easier on transmissions tho.... Pro Torque will go faster once you figure the suspension out!!!!
Had a Neil Chance and about melted the transmission trying to get it to spool. Stuck in a converter with no name on it a friend had and it worked 100 times better. That same no name converter is now at ATF getting checked out and rebuilt for my exact combination.
We have had good luck with our Chance converter, it was from a very big cube n20 engine. We leave on 4200-4300rpm at 15-18psi with 47-88s, 4-7% slip on the big end depending on the combo of trans fluid we are running.