Correct. You can shoehorn anything into about anything with the right time and money. I recently had a Yamaha Banshee in the shop that had a 2000 ZX9R engine shoved into it. We are working on a tractor puller right now and putting a chain drive Vmax engine into it.
There is another guy that sells a Kawabusa. It's a Kawasaki ZRX1200 with a Suzuki Huyabusa 1300 engine into it.