The Jeep ports don't line up even close to the OHC head. I had a 4.0L EFI Jeep and actually have a spare intake manifold for it. It would take some serious cast aluminum cutting and welding to get things to work. I've only heard of a small handful of folks that have successfully used OE computers and wiring on a different car and never heard of someone successfully using an OE computer and harness on a different engine than what the OE computer was designed for (not counting stuff like a 305 chevy to a chevy 350, etc).

Fun fun. I finished the wiring a few nights ago. I'm planning on assembling the valvetrain this weekend and prime the oiling system to see how my modifications faired.
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Rebuilding an OHC Pontiac 250 with EFI and a Turbo