I am concerned that the AX15 will require trans tunnel modifications. i have a BA-5 on the Engine from the Cherokee which is much smaller and would fit with out issue. To get the car in a derivable condition, I am running that. The AX15 will be the first thing I do when I am ready to goto the body shop for that kind of work to be done.
At the very minimum, the AX-15 will at least require the upper crossmember to be cut out and re done. Maybe some sheet metal work as well, depending on where it’s sitting in relation to how it would be with a factory engine.