its almost christmas time and i am wanting some performance parts for my '92 TBI. ive already got an exhaust system, and im getting a K&N filter, computer chip a new headliner to replace the old messed up one, and a SLP positraction unit. what are some other little things or thing i can get to improve power? do pullies really make more HP or does it just feel like it? and what about those power tower TBI spacers that claim to gain 8-10HP?