I believe the AX15 that Novak sells is the same as the "Terminator AX15" that Rockland Standard Gear sells.
It's the Toyota version which I think they used behind the V8 trucks.
Anyway. I had this trans in my old TJ that I parted out.
I sold the complete drivetrain (AX15, 241OR, Super8.8, HP30) to a fellow jeeper.
He did a GM 6.0 swap in his Jeep. Everything held up fine behind the 6.0.
That is good information for the OP. I knew that the AX15 shared parts with the Toyota transmission but not exactly how.