Front clip the car with a clip from a '91-'96 Dakota pickup. A 360 Mopar is a bolt-in or a 350 Chevy will fit with hybrid motor mounts. Here's some gibberish I wrote a while back that has been amended by other hot rodders. You should be able to glean something useful from it.
http://www.crankshaftcoalition.com/wiki/Frame_swaps

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