Got my Wrangler 3.6L Flywheel in the mail yesterday. The 3.6L pilot bearing presses into the flywheel NOT THE CRANK! So a mock up was needed to see exactly how far from the engine block the trans needed to be. So based on the input shaft engagement into the pilot bearing, the trans wants to be ~7.6" from the engine. The 3.6L NAG1 bellhousing is 7.3" in depth, which means a ~.3125"[5/16] spacer/adaptor is need to mount the trans, which imo is just about PERFECT!
I made a quick 3D model of the NAG1 Bell, T5 and spacer to get an idea on how it all stacks up. Just need to work out the exact dimensions of the adapter plate and finalize the mounting bolts/holes and matching hardware.
Reminder of what the NAG1 3.6L Bellhousing looks like.