Just finished replacing my distributor and cc-Qjet with a vacuum advanced distributor and edelbrock 600 cfm (manual choke, manual secondaries)
Once the new lines and fuel bowls filled with fuel she started right up and purred like a kitten. Ran and reved great in park, but when I took her out for a ride it was a little rough.. when sitting in drive the car shakes pretty hard, and also when in low speeds (5-10 mph). The carb came from a 350, i rebuilt it but didn't change any settings, rods, etc... I'm not sure if the previous owner did anything to it. I don't have any papers or books to go with it so i'm not sure what screws do what.
Seeing as it came off a 350 I'd asume its just running rich, but i'm not sure and don't know how to change it.. Can you help me out here?

 

well i messed with the screws a little today, had little to almost no effect... i also noticed when starting off of at low throttle it shudders from 500 - 750 rpm and from 750 - 1250 rpm the motor kinda pulses but anything after that and it seems to run fine..
What do you think is up with it?

 

maybe the spark plugs got fouled out...happened to my car after it ran rich, clean the plugs or if they need to be change em!