I have a '66 250 6 cyl. I had a guy tell me after looking at my exhaust manifold that it was warped and therefor leaking. The engine has 4200 miles on it and previously the manifold seated properly. There are no visible cracks - yet it is leaking where the mainfold attaches to the block. The bolts don't appear to be loose. Why would the mainifold warp? Can it be resurfaced - or should I buy new? Tim-o
