hi i have a stock and real 74 ss nova, it has a stock 350 with headers and dual flowmater exhaust. the motor has a 2bbl, and a points distributor. it has a 373 posi rear, with a th 350 with a shift kit. i got on it the other day full throttle, and it starts popping through the mufflers, sounds like popcorn popping. im not sure what to even look at for the problem, any help would be helpful. im in the process of having another motor built over the winter. but would like to keep this motor running good. i replaced the fuel filter, so thats done. thanks everybody.