I have a 54 manhattan,the engine has been overhauled and i have a ticking noise that is still there behind the carb. The engine has been torn down twice to find the tick, no luck > then on the 3dr go at it i saw carbon on the choke tube to the manifold and found the tube in the manifold to be loose and has a hole in it. Some years ago a member had the same problem and replaced the tube. the question is what size tube--and what metal and where to get it.