Got this head to put on my new Metrakit 65 and it does not disappoint. Compression is great. I did have to end up using the metal head gasket in order to get a good seal, it's possible that someone better at polishing mating surfaces than I am could get a better seal without the gasket.
Even with the gasket in place, it's got tons of power and runs nice and cool. You're gonna have the longest-lived stoplight hopper in town