Surging
Ok the carb I bought it from rock auto about three years ago and maybe drivin the car maybe 300 miles and it's always had that problem and people are telling me I'm starving the 360 you need to go to a 4 barrel and I'm like hmmmmm but your telling me it could be a dirty carb or timing I'd rather try your idea and yea it's more like bucking when your driving it
Small blocks had 2 barrel carbs all the time and they didn't do that.
If you are sure it's the approximate correct size carb, then it's probably not the carb at all but could be a ton of other possible problems.
Like pickup wires in the distributor worn bare and touching the housing when advance comes in. (as an example)
This is just one thing that can cause bucking and surging.
A crap ignition box, a bad coil, a bad ballast resistor, a condenser on points, engine grounds, a broken wire inside it's insulation, a cracked plug, burned core of a coil wire, a bad distributor rotor, a bad cap, wrong timing, wrong distributor advance spring tension.
Any of the above can cause the problem you describe, and I might have even missed a couple.
A lean or too small of a carb usually causes backfiring through the intake at some point in it's driving.
