ROUGH IDLEING 340

Hi Guys I just got a 70 cuda 340 last week. Idled real bad because it had not run much in 5 years. I had the carb rebuilt new wires plugs dist cap roto new tank and all lines and still not running. The idel is about 1500-1800 and if i lower it stalls,I put my hands over the top of the carb slowly till its covered and the idle gets less. I dont think I have a vacume problem, but there is a lot of gas going in the carb when its at idle. The plugs are all wet with gas when I take then out but on the highway it runs good. I would be interested in knowing were number 1 is on the cap maybe its off by a tooth. Has anyone ever ran across this if PLEASE HELP.
Thanks Greg

What carb is it

sorry for the down time, I see anything on it but I think the guy said somthing like AVC it was stock for the car.

Start with completly fresh gas and new set of plugs check the cap and wires and change the fuel filter