Wideband idle tuning with large cams

Recently got my motor running and have been trying to set idle and get a good base to start street tuning with. Issue i am having is the car runs and smells very rich, but the widebands read 14.5-15.1.

I have done some research and most are saying this is very common on cams with a lot of overlap. So my question to you is what do you do to get large cams to idle well and not smell like raw fuel coming out of the exhaust? Carb is a 650dp baseplate, proform main body, quickfuel billet blocks, and stock holley dp bowls. Cam specs:304/306 242/248 .555/.556 110lsa. Engine is 9.5:1 magnum ported mag heads m1 single plane 1-3/4 primary headers.