timing may be advanced too much!10 or12 degrees should be good
cam92rs-thats the carb im using on my current 350. check timing. make sure it is between 8-12 base timing. (no vacuum advance). if you are still having problems. make sure your float bowls on the carb are set correct. the fuel can boil or leak into the engine if set to high. if set to low it may not be suffeceint for the engine. next time it does it. hold the gas pedal to the floor without pumping it, it should fire then bog then smooth out.