Outer Limits 4x4 Board

My old 60 series has been playing up with the current need of a carby, radiator, etc, now they say the motor is almost buggered, whats a 3F worth, its a 2F and looks old, but were wondering, this vehicle used to have a V8 in it, you can see where the mounts were cut and replaced, how easy is it to put another V8 in it and whats it gonna cost me, its either this or sell it and bye a lada.

I could always pull the good 2F out of the troopy and put it in the 60 series, do the 2 engine swaps as the motor in the troopy is realy good and strong, the guy who used to own it told me he had it rebuilt and used only quality parts, cost him a fortune he stated.