I have a '79 camino with a 350 and it has been running perfectly for thousands of miles and the other day out of no where it started running rough. It isnt dying or sputtering but you can feel it through the car and pedal that the engine isnt 100% and is just rough.

I checked for vacuum leaks and there are none, and I am replacing the spark plugs now, the only other thing i can think of is to pull the edelbrock carb and clean it out.

thanks

check plugs, wires. cap for cracks, rotor. fuel filter. timing, distributors do come loose. vac leaks, carb loose, leaking. good luck!

Spark plugs was it. Switched them and runs perfect. Now i can get it pretty to get her sold :-(