I had to grind away a bunch of the mounting bolt boss since it was running into the distributor. The odd thing is that the boss isn't even needed that low since the screw is only about 1/2 inch long. So it was just a hunk of aluminum hanging out there.

Then I had to grind a shallow cup into the front of the manifold to clear the side of the distributor. It was probably 0.060 thick section about the size of a silver dollar.