Thanks Matt, I'm comparing the RPM numbers with different rear ends against my 2000 V10 with 4.30 and 215/85/16 tires. The 6 speed makes for some interesting things to think about. The 6.2 is really close to my 2V V10 as far as torque so I'm looking at RPMs in different gears. So far I'm looking at 4.30, 4.56 and 4.88

Denny