A long list of messed-up engine parts is cause to say "Yeah, I dodged a bullet"!
Apparently ever since a detonation issue on the engine dyno it's been running with four scuffed piston skirts (two of them cracked), one oil ring pinched in its land, center main bearing destroyed and main web & cap distorted, and all four sleeves have piston ring "signatures" in them.
The damage during that last run is extensive: Three cam followers destroyed and cam lobes scored, two bent valves, a valve seat rotated in #3 and another fell out on disassembly, and #4 chamber chewed up by a piece of the #3 valve seat- which took the scenic route through the blower manifold! I believe this mayhem was initiated by my lousy design of oil passages through the followers' pivot studs. Drilling the desired .052" holes full-length through the 1.2" long ARP studs was not possible, so I had drilled them larger for most of their length, leaving just .2" to drill to .052". But what I created were sludge traps! A number of them were clogged with babbitt material from the center main.
Repairs are underway but will continue through the winter.