Exhast ports for those with headers

When I removed my stock exhaust manifolds I could not help notice how small the ports are compared to the gasket and the new SSW headers. I can see why headers are such a bang for the buck with the restriction of the bend, size of tubes and the design. I guess I should have posted pictures for those that don't have the headers. I put the stock gaskets up to the heads to see the difference, then the gasket to the headers and I'm thinking to port match the exhaust on the heads and not sure if it makes sense and if there will be much to gain. In theory it makes sense to let the flow come out, but without the heads off and valves out etc. for the proper head porting, I'm not sure. I might just do it anyway because I can't see what harm could be done to open it up a little just to match the headers. The headers opening match the gasket size in most cases and in a few areas just a little smaller.

What what are the thoughts and who else noticed this when installing their headers?