Top End Needed

Oz, You have lots of torque but I'm afraid you may not have the head to turn much more RPM I have a similar combo in a bit lighter car and am turning about 6500 @ 130+ with a 29x10 maybe a taller tire is in order. I am also running 3.91 gears.

Sounds very similar set up I do think I need a taller tire......add that to shopping list