I just bought a nice M1028(6.2L/400/205/4.56 and 32" tires) and I am trying to plan the best way to have it all. Good power offroad, able to drive on the interstate, and good mileage are my wish list. The first item on the change list is the tires. I guess I will need to go to 35 to 37 inch tires to help with the rpms. Now the real debate is the lack of overdrive. 1 - I could swap to much higher gears, something like 3.42s or 3.73s. 2 - I could replace the th400 with a built 700R4 3 - Or I could get a Gear Venders type OD... really pricey. So far it looks to me that plan number 2 is the best overall. Are there better ways of getting to 2000 - 2200 rpms at speed? I am always grateful for any good advice. Thanks.