The two chrome fuel supply tubes under the upper intake manifold are connected with a plastic or teflon tube(on the passengers side of the engine). Mine is leaking fuel. I tried small hose clamps and they stopped the leak for a while but it has started leaking again. What can I use to replace this tube? The fuel pressure at this point has been reduced by the regulator but is still about 35 psi. (Is that correct?) Any ideas would be appreciated. I believe that Ford only sells the entire fuel supply manifold.