I am new to this forum but not to big singles, i have had a T61 in a Supra, a T88 in a Skyline, a T04Z in a Skyline and now a T04R in a Supra ranging from 735BHP in the Skyline to 550 in the first Supra and the figures look very impressive but you will be losing drivability and spending a whole lot of money (T04Z cost me 18K on Skyline with ECU, Fueling and Exhaust!) with it as well, the best advice would be to test drive a big single and see if you could live with the drive every day, I find 500-600 more than enough for every day use and with RWD any more needs extra traction control to prevent wild wheel spins!