All Plugs Fouling on Right Bank

Cudafever said
I guess you could still have a vac leak on the leaner side plugs. is that the hose to you brake boost or you pvc on the back left side of the manifold.(left side looking at it from the driver side.

Back left side, with the white cap is for the brake booster. The hoses and clamps are new, but the valve is original ... That's a thought. I took you another carb photo.