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 VMP TVS l JLT123 l O/R X l 28x11.50Rx15 M/T Street R's l BMR Suspension l Recaros
03 Sonic Blue 3.8 / 17 Magnetic Fusion Sport 2.7 EB