It depends.. how much do you want to spend? I'm making 170whp and 124ft lbs with just intake, a crappy cheapo DC header, and cheap 2.25" exhaust with a tune.

Without getting new pistons and rods and all that, 220ish to the wheels is very doable. Get a good intake like a Comptech, a good header like Hytech, RMF, Kamakazi, etc. Some good cams, I like Crowers, and Toda, and a good exhaust as well as a tune. To tune, you're going to need to convert to OBDI. To do so you need a OBDII to OBDI jumper harness, and an OBDI ECU, such as a P28 or P72.