Mike, You could use a little of the high temp RTV (copper/orange) on the exhaust manifolds to give it a little extra grab, but I'm guessing that once you get the end brass bullet nuts on and tight it should align and snug right up. It does bring up an interesting thing though....will the heat cycling of the ex manifold make it "fall" in relation to the ex port at the head?? You might want to send a PM to the Doc at .org and see what he says, I know enough people are running those manifolds, someone has to know.
Looks like a SWEET setup by the way :thumleft: