Hole in carb - what goes here?

I got a rebuilt 2jet from holley and bolted it on only to find it ran like crap! I have it all on and set up and found a big vac. leak was my problem. the leak is from a hole on the base of the carb that my old carb didnt have or was plugged. what goes here or how do I plug it? it isn threaded or anything. it shown with arrow in pic taken from behing carb.

 

Re: Hole in carb? WTF? what goes here?

What model is that?
Probably ought to return it. You can't tell what else might be missing. Could be a vacuum fitting, could be missing a bb-like plug.:hurrican::?

 

It is a rochester 2 jet off a 71 cj5, I cant figure what should go there maybe some later model emissions? other that that its identical to my core. I think I might just fill the hole with a plug.Im not sure that wouldnt blow out in the event of a backfire. Might just fill hole with molten lead and call it a day.

 

press in a bib fitting or what ever they are called ( just like the one next to it) and put on a rubber cap. That way if you ever need a vacuum source you got one.

 

I plugged the hole and now all is well but I have smoke comming out my pass side pipe.not bilowing or nothin,just noticable. It is white grey in color I guess I would think more along the line of oil than water?? I suppose after spending money for hei and carb the motor is going GGrrrrrr!