Update.
Seats and guides installed. I dropped off the full complement of valves today.
They'll need to sleeve another cylinder, as there was another blemish that won't clean up at the top of a bore
I have my Harland Sharp 1.5 rockers and I purchased ARP rocker studs, which oddly are labelled for Pontiac 64+ heads, but have a ½" coarse thread and don't fit Pontiac's 7/16" coarse. So, I just dropped them off at the postal shop to return to Summit.
Just a waiting game now...