Blackdawg, again, I'm not looking for cobra speed here just like it to have a little extra pep.
As for the other Questions, I'm running a 265/75r16 bfg at. Volant intake, headers and dynomax superturbo muffler. The truck has the stock 4.10 gears. Look, at part throttle its fine. I'm cruising 45, ease on the gas and she pulls well. BUT if I need to pass a big rig and floor it, it acts like its gonna really take off, then just bogs and doesn't pull any harder then at part throttle. This happens at all speeds. No matter how fast. When it kicks down it acts as if it gets slower and harder to accelerate. Now, I just replaced plugs, timing belt, water pump, pulleys, belts, coolant flush oil change, fuel filter change, "o" gasket in tbody, heck I even put on an lcengeering 2.5lbs crank pulley....NOTHING. Still doesn't kick down very well. I'm running out of ideas and its getting frustrated.