Okay, I am currently running 33-inch BFGs with 4.10 gears and a th-350 tranny. I am finding that at roughly 55 to 60 mph I am turning around 3,000 rpms. This seems kind of high and I don't want to damage my motor, etc...! Anyway, my questions are as follows: 1) How many rpms can I expect to drop at say 60 mph by switching to 35 inch tires? 2) I have a 4-inch lift + 1-inch off-raod design lift shackles in the front and have pretty good clearance with my 33s. Can I squeeze 35's on my Jimmy without any problems (i.e. rubbing)? Thanks!