Buy a FWI from www.intense-racing.com
for 1997 cars, and ditch your double headlight washer bottle for a single to make room for it.
2.7" isn't a common size for us. 94/95 SSEi'* typically drop to 2.5 (or 2.55" 92/93 stock) IF and only if they satisfy all the requirements I posted. You need to understand that KR can kill your motor. Pulley drops aren't plug/play.
Custom catback will gain you nothing. You have 2.5" mandrel bent stainless already. Most run stock mufflers well into the 13'* on the quarter mile. Replace the cat with a high-flow cat and that'* all you need for a long time. Have you found a good price on ebay for your scantool and contacted Slug for your cable?
Stock with good compression, no leaky manifolds, and decent fuel pressure in good tune your car is 225 hp, 275 tq.
Your list would net you about 235hp and 285 tq.
Follow my list, and you'll get 240hp, 300tq. Assuming all the other stuff is taken care of.
What are your fuel pressure numbers?