I just bought a F250 with the 460. I rebuilt the carb, put in a new distributer, fixed a couple vacuum leaks, new plugs, wires cap/rotor and PCV valve. Now when I just barely hit the gas it sputters and lurches if I give it too much gas. I set the timing to 8 degrees. The idle is around 1800 RPM's and doesn't change with any adjustment to the carburetor screws. I am wondering where to go from here, and don't know what to do next.