Ok so I was thinking that was carb related cuz I was jus doing sum carb tweaking on my f600 bucket truck and found out I had the holly 4412 race carb and ended up not being able to tune it right so I bought a new carb the 7448 holly and she runs alot better no more back firing but I think there might be a governor on my Rochester 2bbl that's on the c50 it kinda looms like a funnel turned sideways with vacuum line going to dizzy so I'm guessing that's a vacuum advance of sum sort???
