You will spend a load of money on a trans adapter. Your best bet is swapping in the engine, tranny, and transfer case and custom building the tranny and engine mounts. If you have the capability and equipment, this would not be that difficult.
Why a chevy engine??? The Ford engines have pleanty of power, even the 302. I have a Ford 302 with an 88 chevy TBI (fuel injection). I grafted the wiring harness, Throttle body, computer, sensors, etc. This swap was worth every penny (about $500 total).