Was it Mumms or Capaldi that was stripping gears once they had the diff and axels upgraded?

Anyway, if you stick with the ATX then you are going to want a torque converter that has an anti-ballooning plate or it will fail in no time.

2005 Ford F150 SuperCab FX4 1964 Chevrolet Impala SS 1998 CSVT: 354HP/328TQ @ 10 psi, now gone