I have a 1966 C10 I am going to start on the body soon and need to know if the cab is worth saving. There is not too my rust damage just the usual that everyone fixes. But the one thing that has me troubled is above the drivers and passengers heads there are one small holes each that are starting to appear and when it rains or the snow melts water come in through the holes. Would I have to cut the top of the cab off and replace it.