[Roadsters] carb oil--how much?

[Tim]

I get a fair amount of stumble when the car is not warmed up. I check the pots and I seem to have one that does not have enough oil in it. I did some poking around and was not able to find out how much I will need to put in. 

How can one tell if the pot is full enough?

Is is possible to overfill and thus have a detrimental affect?

TIA

Tim
Belleville, WI.
'70 SPL AND SRL
Still clueless but always learning