It'd need to be a "good race prep" to pull 100kW at the wheels. I've seen 78kw A15 in a 1000..was a quick little car.
A worked L18 might also fit the bill.
A supercharged/turbo'ed A14..Quite possible.
CA18DE, shouldn't be too hard, need an aftermarket computer.
Why not a CA18DET..I still think this is the best way to get good horses into a 1200.

Toyota stuff is pretty good, but I wouldn't do it, I like Helal horsepower, just like my kebabs.