The h22? Thats what I will assume.
Definately the most power in that engine. Also the hardest swap.
To make any serious power to "blow" everyone's doors off you will need more than a motor swap. ex: turbo, supercharger, or n20. a super light hatch would be a nice start. Whats the 91 hatch weigh?

Putting a body kit on there will only Slow you down.