Thanks, Dave. Next question, I had a lot of trouble ( I believe) with the 216 manifolds I have. How can I test the intake to see if it has a vacuum leak? I am thinking to duct tape over the openings for the carburetor and the head ports then submerge it in water to see if there are any bubbles. I'm not sure if that would work. If there's a better way to go about it, I would like to know what it is.
