Ditching a quick fuel carb.

I just want to rule out the carb for the high idle and mass amount of fuel it's pouring into the cylinders. At least if i put on a differant carb and it stops idleing up so high I can maybe get this thing to idle and set the timing where it need to be. As I can't find a vacuum leak with it running the way it is and me having to hold the choke plate to keep it running. The engine has'nt been decked.