4bg1t to ax15 jeep swap

im swapping a 4bg1t motor from an isuzu generator into a tj and was wondering if anyone had any info or experience with it...
pretty uncommon swap from what i hear.
i know there are adapter kits from an SAE 3 flywheel housing, which from what i can tell is what the 4bg1t comes with, to the AX15 transmission. but that doesnt solve the flywheel issue.
i understand that i may have to get an adapter made, does anyone have any imput on how best to measure the distance between flywheels so that i can get one made?
i havent yet pulled both flywheels and housing apart, the jeep 4.0L and the isuzu, so there may be issues with imput shaft spline count...? ill know later this week..
am i going about this the wrong way?

cheers for any imput.
-J

Welcome aboard!

I think you're overthinking it. Once you have a flywheel that fits the crank, and pressure plate that fits in the housing, you only need a disc with the correct spline, diameter and thickness to work. Clutch discs, even custom, are relatively inexpensive. You may have to modify the throwout, but that should not be a significant issue.