Carter carb tuning ?s

hey guys need your input and any advice you have. I have a commando 273 in my baby with the 4sp. My dad upgraded the cam in the old girl a while ago and he doesn't rememeber what it is. My question is when trying to tune the carter for more fuel what has to be done? I'm thinking bigger jets but which ones are right and is there anything else that can be changed? I do have a problem of after it sits for a little bit it floods out. I actually watched it one day when i was working on it as it was off nothing was being touched and fuel was dripping into the carb from the jets. Anyone else expirence this? To me it seems my car runs lean from what i could see on the carb there isn't any 'adjustment" for richening it up just to set the air adjustment and idle mixture.