[JRMichler]

Swapping a different carbureted engine for a carbureted engine was simple - find/make engine & transmission mounts, adapt the driveshaft, figure out something for the speedometer, build/adapt throttle linkage, ditto for the transmission linkage, figure out radiator and heater hoses, gas line, electrical wiring, a few other things, and done. One long weekend with a friend to help and shop facilities at hand. And lots of small parts.

Swapping a modern computer controlled fuel injected engine is about ten times the work, much of that figuring out how to get around the nonexistent BCM.

I suggest working with what you have. Minimize total driving, grille block, tire pressure, air dam, wheel covers, and get a wide range fuel air ratio gauge. Then work with the fuel air ratio, your driving habits, and maybe some carburetor tuning. Also the transmission shift points. If you get really ambitious, try swapping in a five speed to get the benefits of a manual transmission plus an overdrive fifth gear.

You will be amazed at how much you learn just by maintaining what you have, plus the improvements I suggested.