I read your build , nice adapter , but I have the 2.4 version , from what I have read has the same bolt pattern as the 2.5 . I know I can reuse the clutch / fly wheel , but wanted to check about the starter and CPS as well as the Trans mount ( your not this far yet ? )
for the mount you can read my other thread in Member's projects called "sharpxmen - Drivetrain upgrades", i have installed an NV3550 and i have pictures in there for what to do, the NV3550 has the same mount pattern and location as the NSG370, you can reuse the 2.5L mount by cutting the holes open at the ends (the 4.0 has 4 mounting holes that are just a bit further apart than the 2 holes on the AX5).
I didn't get to the crank sensor yet, it's just a matter of cutting an opening in the NSG370 bellhousing and fabbing 2 mounting studs, one would have to go onto the adapter and the other one on the lip of the transmission from what i can tell so far, i didn't get to do that yet but i don't see an issue.
the starter on the 2.5L is in the same place as the 4.0L, luckily it is bolted to the engine block and not to the transmission, so you don't have to worry about that at all other than fabbing an inspection plate (i got the one that came with the NSG and just going to cut it in 1/2 as it originally goes behind the flywheel on the 4.0