Bri

I think your right “Why Not”, even though it may be pointless over a single engined high powered car and handle strange, the hard work has all been done when putting the engine in the rear so putting one in the front will be easy.

The hard bits will be balancing them, which may not be a problem but the gear ratios and final drive will have to be the same. Also the gear linkage would be a pain, you could always make it so you can put them in neutral then have a quick disconnect pin to leave one in neutral so the other one does the work rather than locking the clutch.

I would check up on the legal bit about running two engines, what about hybrid electric/petrol cars do they only run one at a time?

Jim