All of the 95-99's are more or less the same stock with a slight advantage to the 95-96's because they're lighter and have a bit less unsprung weight.
Between a 98 and a 99, again, pretty much the same stock, but the 98's use the older style y-pipe design which sees bigger gains via aftermarket. The 99 uses the 00-01 style which, doesn't see as large of gains via aftermarket y-pipes. So if you're planning on modding, a 98 would probably be better. If not, either is fine. If you *really* want to mod, 95-96's are by far the best. Older OBD-I style emissions and there are ECUs available for them also. 95-96's with bolt-on's, the JWT ECU, 7200 rpm limiter, and the MEVI are freakin beasts!
