I'm not sure we can assist you much. Everyone on the highboostforum enjoys fast cars, but I think the majority of us are knowledgeable about primarily Evo's and DSM's.
I'd highly recommend finding a Lexus specific forum. Maybe post your questions on this forum here: http://us.lexusownersclub.com/forums...p?showforum=88
Sign up on that forum (if you haven't already), become a member, and start reading. Good luck with your project.
BR 2.3 Stroker
BR Forward Facing HTA86
605whp & 513wtq @ 32 psi on E85 (BR Mustang Dyno)
Tuned By David Buschur