Personally, I'd ditch the Nitto's and go M/T ET Streets (Drag radials). That's what I'd do if I were you. I'm cutting lower 1.8's with an open differential (3.23's) and a much smaller tire (235/60R15) drag radials at 28 psi. Oh wait, I run factory stock leafs with traction bars (slappers!)... never mind :D