I just put a new rebuilt 292 ford y block into my 1955 ford f150. The exhaust is a cross over It had a major exhaust leaks so I changed all of my gaskets. After fixxing it . I proceed to take it for a drive . About 10 mins down the road I pulled into the local gas stations and noticed that there was smoke coming from the hood. I popped the hood and noticed that driver side exhaust manifold was red hot? I checked the radiator and it was full. Can someone please help me. I probaly have 250 miles on the new engine