Figured the top end was ready to go together but discovered that the Cometic gaskets that Kaase recommended overhang into the combustion chambers. They said use 4.500 bore gaskets which seemed safe with a 4.390 bore size, but the chambers in the head are so big that the gasket overhangs near the exhaust valve. Evidently Kaase runs it that way but the engine builder I'm working with said to order new gaskets. So I got a set of 4.600 gaskets ordered from Summit.

If I get a chance to do another engine I think I'll buy the 4.500 bore block from Ford and build a 4.500 x 4.500 engine with the same exact heads. Be interesting to see the comparison between the two. The Ford blocks are available for $3900 which seems like an okay price.