G1teg.org
you know...a b16a (civ-si) motor fits in there nicely! that'd be a nice sleeper. If you get that motor you wont have to worry about clutch slippage and other problems.
if you get springs, be sure to get shocks. And make sure you get the correct shocks for your springs. If you get springs that lower a good deal but have soft shocks - they'll be gone quicker than stiffer shocks.
check out
Team-Integra.net as well.