It has a 350 motor in it. When I start the car it runs great. Lost a little power. When the car is warmed up, nice and hot, it starts running like crap. Missing, car shakes pretty good when accelerating. New gas tank, gas lines, and fuel pump. Replaced spark plugs and wires. Replaced ignition coil and thermostat. No difference. I'm stuck and dont know what to do. Oh yeah, timing is set at 4 degrees.