Was wondering whats available for a 97 GS peformance upgrades? It's got the 720 motor & I see lots of people saying to just upgrade to the 800, but thats not gonna happen. Is there anything from other models that will fit with relative ease/ slight modification. Just looking mostly for exhaust and intake bolt ons. Are the upgraded intake grates that are on the market offer good performance for the price? Don't wanna get too crazy.