Picked up the 7F6 cylinder heads today. Nice and shiny on the bottoms. I had them measure the chamber volume and it turns out it is 107cc versus the original 111 cc advertised volume. So it looks like it was resurfaced/milled at the last rebuild 20 years ago. Hopefully this gives me a bit more than the 8.4 to 1 that the original style flat tops give. Maybe 9 to 1?
I also dropped off all the rotating parts and they should be balanced by next week sometime. Then comes the fun part: assembly.