delow: Yes you can put a 98 pcm in your 96, but it has to be a 49 state pcm(non-california model) and you have to update the pats(key) system to the 98 style. it's pretty easy as i have a 98 pcm in my 96 but not very cost effective. it didn't cost me anything so thats the only reason i did it and to be honest i couldn't really notice much of a sotp difference!
03 cobra, Bolt on's. 11.49 @ 122 mph famoso
98 gt, PI heads, comp 262ah cams, K&N, Bassani catted X pipe, 70mm T/B, 3.73's, trickflow track heat intake.