Those S197's are some nice cars...if you want to start out with some more basic, but still effective mods, go with a CAI, exhaust and good tune.
If you want to go big and put some Camaros away look into forced induction ~ supercharger (roots styled, twin screw, or centri - procharger), turbo or nitrous
There are tons of mods out there for the 3v's, so your options seem endless
12 Black GT500 SVT PP l 2.6 Pulley/Idler l Airaid l o/r X l 305 NT555R's l Recaros l
04 Azure Blue Mach 1 / 03 Sonic Blue 3.8 / 14 Sterling Grey F150 FX4 402A 5.0 / 11 GT500 R.I.P.