ok so just as the title says, after 20 to 30 min she starts getting real sluggish and eventually (45 to 50 seconds) dies. Also, it struggles on quick acceleration and seems to take a while to start and stay running(five or six times before it idles well at initial start when engine is cold. After it dies, it will not restart until 30 or so minutes has passed. Here's what i have done so far. New plugs, wires, cap, rotor, and coil. It has a rochester 2gc carb it. I have removed the filter and cleaned it to the point of damn-near-new lol. Also, i took the carb off and cleaned it as well as installed new gaskets. Problem still remains. Any suggestions?