I have a 427 side oiler with two 650 Holley 4 barrels. I'm thinking I might have a vacuum leak but not sure. There is a small rubber hose (aprox 3/16 ID) that goes from the front carb diaphragm to the rear one on the left side of the carbs. If I pull one end off and apply a vacuum coarse I get nothing, no vacuum will accumulate. Should it hold a vacuum or is it open to atmosphere? I'm getting all kinds of theories but I want to be sure.
Thanks.
