[olddog]

After spending a couple hrs getting detailed measurements, it will come pretty close to matching up once I open up the manifold to the gasket. The manifold port widths are on average about 0.040" +/- 0.012" narrower than the gasket. Only one port will end up with 0.010" of gasket hanging into the port. The head port is 0.010" wider than the gasket so that endge will only be 0.005" mismatch, and I will trim the gasket to the manifold on that port.

It may not make a big power differance, but since it is multi port EFI, I think it will buy me peace of mind. If different ports are getting more or less air, then the mixture is different in those cylinders. A little rich on the cylinder with the O2 sensor and the rest could end up lean. So I will port match the intake to the gaskets and see what it looks like.