Sorry, I can't give up on the RX-7 Twin Turbo. I made an easy 270whp in mine for about 2G's and it weighs 2750lbs RWD. For the extra $3K I could make it hit 340+whp and run low 12's and it would handle real well and you could still get the tail out real nicely.

downpipe, mid-pipe, catback, 1600cc secondary injectors, Supra fuel pump, Apexi' Power FC ecu, Intake filters, bigger sidemount intercooler, and a manual boost controller.