Okay I have a 91 Blazer. I am gathering parts to do a 1-ton running gear, lift, and tires all at the same time. This is a daily driver to work (5miles), must be driveable on the freeway and everywhere else.It will be off-road in the Oregon/Washington area a couple times a month. What is the rpm sweet spot for the 350 engine? Yes I have Overdrive. I am trying to do it once, the right way. I have been leaning towards 37-39inch tires with 5.13 gears. Any help would be appreciated.