the engine started... ran... then reved... then it died down a lot... then it stalled... anyone? we changed 2 plugs and put on 2 MSD wires tonight... for some reason we dont know why the car wont start any more. Its like there is no spark to the engine... i checked all the connections to the coil and to the dist. We uses R45TS plugs instead of the R43... would that change? i thought they still had the same heat range, just different lenght? anyone please help... all carb people help!!!