[delsolvtec]

Dude you can fit a GM 502 in there if you have enough money. I would personally recommend a B16 swap for a few reasons.

1. Easy to locate a B16 donor
2. Cheaper then a B18 or an H22
3. Easier to install since some sols came stock with B16s so you can just buy the halfshafts and stuff for a B16 sol and install everything with little to no guesswork.
4. The B16 has just as much power potential as the rest in a more compact package. I have seen fully built B16s smoke the doors off built GSR integras and H22 equipped cars.