Always fancied a twin engined mr2 turbo as you could put a Celica gt set up on the front which should be RELATIVELY straightforward and the rear setups already done for you.linkages should make sense as their essentially the same box just one operates in reverse of the other so I'd guess that's not impossible to link up.
I'm assuming if it passes biva or at worst sva it should be fine.petrol tank mounting would be an issue along with maybe fuel lines/exhausts I would say.