Sure, I mean it's not like these are collectors items. If you want to spend your time and money sourcing the needed swap parts that are already on av8 car jump on it. The op said on a budget. Nothing about a swap without already owning all of those parts in the dorm of a donor car is budgetary.
But let's make that list he needs and dollar signs subjective depending on quality and condition
Motor and trans trans
Driveshaft
Carb and intake
Carb friendly distributor
Fuel pump
Carb Friendly Fuel Tank
Exhaust
Starter
Motor mounts
Rear end since that 7.5 will explode and has an open diff to boot
Ignition box
Probably a good idea to replace that worn suspension including springs, struts, and control arm bushings.
Trans mount
New radiator
Tranny cooler
Depending on his engine choice he may need a whole new accessory set up
Throttle cable
Kick down cable
Are we leaving stock 4cyl brakes?
Stock k member will work but the v8 unit is wider allowing more room for brakes and tires.
5 lug swap?