Got a problem with my 750CFM VS on my 360. It doesn't respond at all to idle mixture adjustments. The usually means that excess gas is entering the system. So I went through the usual suspects - 1) Float level too high - checked and was correct just barely trickling out of the hole. 2) Primary throttle blades opened too far - pulled the carb to check and was correct (transfer slot looked like a square). 3) Blown power valve - checked with tester and was not blown. 4) Fuel pressure too high - gauge shows 5.5 lbs pressure. What have I overlooked? It's frustrating and can't seem to find the problem other than something wrong with the carb that is leaking gas into the manifold. Plugs are gas fouled and I've went through 2 sets of new plugs and don't want to buy a 3rd until I find the problem. Gaskets seem perfect. Thanks.