Carter carb tuning help

Since you have no timing mark, I'd ajust the timing by the power tune or detonation method.

Warm the car up.
Be sure distributor is loose, but not so loose to move when the engine fires.
Hook up a diagnostic tachometer.
Rev the car to @ 2500 RPM.
Advance the timing until the engine JUST starts to run rough, then retard it back until it smooths out.
Let off the RPMS.
Tighten the distrubutor and drive it to see if there is any difference.

This is only something Ive done to eliminate detonation as a posibility for a car running crappy, but generally this is a good way to baseline the timing to what the fuel will handle, so that you can try other things.

Keep in mind that the fuels we run in everyday use are blended for the temperatures and weather anticipated. We are about to switch over to "winter blend" fuels, which will again affect tune.

Mark.