Mine is a 6319s, correct for a '73 340 Auto.

Installed a restrictor in the choke pull-off that I drilled to .0135", too small to pull vacuum. Went up to .016". No more bog. The tires spin instantly at the hit of the throttle.
Now a new problem has shown up. As the car gets rolling through first gear, the engine feels as though the carb is either way too rich or way too lean, kind of shuddering. Eventually it gets better after shifting into second. Spark plugs checked good.
I adjusted the amount of opening on the air door but didn't help the higher RPM situation. I'll hook up the Air/Fuel meter to see what's up. Might have to back the jetting off now just to see if it helps.
I'll have to work on it another day.