Whats a good rpm to run HW speeds at? You above say your pushin 2300 at 70mph. I would have that thatd be kinda high. I run about 1850 at 70-75 with my stock 3.08 rear. I wanna go 3.73 being I have a 85gt with T5. I am thinking itll put me about 2300 too at 70-75. Is this ok on a pretty...