Well I dont know aton about LS... but if you dont plan on going boost.... Id say the first thing you want to do is get a shorter geared tranny... B16 or GSR and im sure you will notice alot more "pep" from that... Id also suggest a set of cams... Intake manifold... a bigger Throttle body... nice exhaust set up.. Lightened Flywheel.. decent clutch... and a GOOD tune.. also weight reduction would play a big role in your car perform decently