AX15 trans any good?

AX-15 was stronger than the AX-5, and will live behind a mild V-8. BUT it is a medium duty TRUCK transmission, and has some pretty non-performance ratios: 3.83, 2.33, 1.44, 1.00, 0.79, for first through fifth, respectively.

It was available in Dakota trucks, so you should be able to adapt it to an LA engine with factory parts (look for a 3.9L V-6, as the 5.2L typically had the NV3550). Obviously you'll want a 2WD trans.

Then there's the hydraulic clutch, shifter location, floor clearance, rear mount, etc...