I gotta agree with Rush, I don't like RENIX, though it works. Honestly I prefer OBD2 over OBD1... personal preference however. Pick your poison.
I think you might be complicating things though, whompinxj - unless you want to upgrade to the HO electronics, it's optional. You can literally bolt on every single one of your RENIX senders, manifolds (except exhaust - see below), etc onto the motor, stick your AX15 in there, and the only new part you need to buy is a RENIX flywheel. Flywheels aren't that expensive, rockauto has a decent one for $57 brand new. The RENIX auto ECU really won't care if it has a TCU to talk to or not, and the TCU won't really care if you disconnect the AW4 from it and leave it hanging. I ran my 91 with the AW4 disconnected from the TCU for months after my AX15 swap just to see if it would affect anything, then removed the TCU as well, there was no noticeable difference and RENIX cares even less about the TCU than OBD1 HO does.
So unless you WANT to swap to the HO ECU/intake/etc you really don't have to. Just split your donor engine/trans, swap in a RENIX flywheel, bolt it back together, stick your RENIX senders and such on, perhaps swap the distributor and/or cam position sensor (under the distributor cap+rotor), gauge senders, accessories etc onto the block, wire your AX15's reverse light switch into the right pins of the jeep's NSS connector, shunt the P/N pins on the NSS connector (or add a clutch safety switch here if you desire - they didn't come factory till 97).
This thread:
http://comancheclub.com/topic/29861-ho-head-on-renix-block-opinions/ indicates you can use RENIX intake manifolds with HO heads, just have to swap to the HO exhaust manifold (to avoid the port mismatch blowing out the manifold gasket) and downpipe, so for that you can either:
* swap RENIX head onto block, use all RENIX manifolds and electronics
* swap RENIX intake and electronics onto complete HO motor, use exhaust manifold and downpipe from donor
Up to you. There's quite a variety of ways you could do this depending on what parts you actually want and which you just think you have to use. Depending on whether you're in smog-check land or not, you could end up with an EGR delete out of this as well, since swapping to the HO exhaust manifold does away with the port for that and leaves you only needing to put a small blockoff plate on the intake manifold port for it.
IMO, the easiest way is to keep the RENIX computer, it's worth having to buy a $57 flywheel to not need to strip down, splice, and rewrap the harness for a few measly horsepower going from RENIX to HO. It sounds like you just want to minimize the amount of work needed to put this all together, so this is probably the route I'd choose.