You've wheeled it, what? twice? And you're already talking about a complete drivetrain swap...
No way I'd take the time and effort to swap a v8 and tons into a finished Ftoy.
Because then you'll want to 4 link it
And then you'll think " Well ****, putting a front and rear 4 link on a Toyota frame kinda sucks"
Then you'll cut out all the frame and re-do a sub frame.
And then you'll think "Well ****, I'd like a buggy that don't look like a bread truck now that I have tons and motor that makes cool v8 sounds"
Then you'll cut up and re-do some of the upper tube work, and put a new front end on it.
THEN, you'll realize that the original rig you started with is all in pieces laying on the floor, and you could have just built another rig with 4 seats, a v8 and tons, and had exactly what you wanted, and could have kept wheelin the Ftoy the whole time.
:****: