well if your going to use it as a dd and rally then your gonna want to build around rally. so the first thing for rally races i would worry about is suspension because it will take a beaten. then do few bolt on parts such as exhaust, ignition parts, trottle body, ect ect...you will also want a better flywheel and clutch. a good tune after some of those bolt ons will help a good amount. for a tune as always i would suggest tom. you will need a wideband air/fuel gauge.
hn155:rockford stereo, will have 2 t215's 2 punch pro tweets 2pro 6.5mids, t400.4 t1500.1bdcp.
perfomance build to come, lentach tranny, engine build for 250hp, turbo.