Greetings- I have a 1995 stang with a V6 and recently replaced the tubing that connects the radiator with the plastic overflow tank but I have a very small leak at the fitting on the radiator end which is allowing air to enter the system. It seems as though the sizes of the radiator and tank outlet nozzles are different. I used fuel line for the replacement tubing because it was the closest thing in size I could find and also used hose clamps. Is there special tubing for this and if so what size should I use? It doesn't make sense that two connections used on the same hose are different.