Hi Dave!  I went back and found the photos: First I sat the gland rings in the intake ports of the manifold to be sure they fit without binding.     Once tapped in, I measured the amount of metal proud of the casting and the gap.  I just didn't want any surprises when I installed the manifold.     Then over to the block, I installed all four gland rings, and remeasured gaps and the height of each ring.  Everything was good here. I did not wa