well I took them to the boat shop and he said the manifolds look good inside, however once I got them home I started looking at them and realized that metal is rusted and flaking off around the sides of the gasket surface where it mounts to the head (not the actual gasket surface) I just assumed I would replace them so I won't have to deal a possible problem in the future.
If I can continue to use them that would be great! This boat fix up project is going to cost enough as it is. I will try and get a picture of the rusting area and post it.