who else runs a comp cams 268h cam in a 350? If so what kind of carb, gear ratio and tire size are you running. I have a holley 650cfm double pumper(horrible carb for a 4x4), 3.08(horrible gears for a 4x4), and 35" mud terrains. I have horrible gas milage, my engine makes good power though. I was thinking of switching to a 670cfm holley truck avenger. I think i would get better gas milage, and eventually 4.10's with 38.5" tsl's.