It should fit with some butchering . i have a friend with an Integra type R engine on a Mini (old one) and even though it's fast it produces way too much wheel spin to be any competitive on the track (or the street )
On my panda i solved some of the wheel spin problems using slicks
a good few years back before i lived here someone got a ferrari engine in a classic mini then got caught speeding at over 200mph!... in a 40 zone i beleive lol