Starting off with the bare head, using clay to bellmouth the port inlet.
Next we will put the intake manifolds on, with the throttle body and all vac ported blocked and untested ports taped off. This shows flow distribution between all runners.
This is the comparison sheet for the middle port using the same head. Test 1 is the bare head, Test 2 is with the manifolds and throttle body. Test 3 is gasket matching the upper to lower and blending. Test 4 is removing the throttle body. Test 5 is removing the upper intake.
Another version of the above but simplified progression. Bare head, full intake no throttle body, gasket matched the cylinder head to the lower intake, and then gasket matched lower and upper intake on the gasket matched cylinder head.