can't be an AX-4 since that won't bolt to the 4.0. 2.5L/2.8Ls have a different engine-to-trans bolt pattern than the 4.0L. Is it an automatic? do you mean AW-4?
what is it with past MJ owners and backing into things?
also, that's a huge chunk of bondo there.
the trucks look solid though. perfect for your plans.
I'm sure you might miss some of the conveniences of the modernity of the chevy, but for most of us the simplicity of the MJ really has a charm all its own and we wouldn't trade it for the world.