preformance ?

the converter was plugged

i have exactly the same car with almost the same problem, my car does not pop thank god! But it does chug and sputter while i am at a stop and then when i accelerate from that stop. And after changing the spark plugs, fuel filter, oil, oil filter, transmission fluid, air filter and houseing, and the brake booster i am still having problems. i believe it is the air intake manafold gasket that is the probelm.