I just recently bought a 67 F100. It has a 352 with auto trans. The wires, plugs and points were shot. So I replaced all of these plus the condenser, rotor, and cap. It fixed much of my trouble but now under constant throttle it seems to miss or sputter. If I accelerate it cleans up but if I let out of it and try to maintain a constant speed it misses. The distributor is a dual advance autolite. The engine itself has 66000 original miles but hasn't been driven in years. It smokes, but I figure being driven might help clear that up. Any help with the ignition miss would be appreciated!