Right now, I have a mostly stock 235 (HEI, fentons w/ water heat for stock intake/carb) and a stock sm420 4speed tranny/Gear Vendors Overdrive combo that gives me the best of both worlds. I still have 3:90 posi rearand, a super low geared granny, and I can overdrive 2nd which is hardly ever needed, 3rd, which is a nice split between 3rd and 4th, and of course, overdrive 4th, which puts at me 2800 rpms at 80 mph. That's the same rpms as 60mph in 4th. 70 is much more comfy w/ stock suspension/brakes and I can actually have conversations and listen to the stock AM radio due to much lower cab noise-dynomat also helps. I am getting 16-18 mpg as opposed to 11-13 previous when truck was all stock. I am also running 29.8" radials. Coming Soon... disc brakes, restored suspension w/poly bushings, and mildy hopped up 261 stroker.
