Nah if you want a v8 d50 make a v8 d50.
Engine mounts
Trans mounts
Driveshaft
Exhaust system
Radiator and electric fan Infront

Maybe some minor cutting to the trans tunnel, they are easy though, I assume you have a mig or Tig. Should be able to fit the radiator in, worst case you shift it forwards and lose the hood latch and use bonnet pins instead.

A carb and manual trans would be very easy. Auto not so bad if it doesn't need a computer.
Easy enough to make an injected engine and matching electronic trans work with a stand alone loom.
Being in the USA you will have tonnes of options for aftermarket stuff to deal with that anyways.

The most over looked part is that it always costs twice as much as you expected and takes 3 times as long.


It's not a crazy wild swap or anything