Vacuum advance can adjustment

I'm curious - what cam is in this engine? What pistons and head? What intake? Have you taken cylinder pressure readings?
It has a Hughes 2832 cam (228@50 .530 lift), flat top pistons, .202 X heads, Edelbrock Performer Air Gap intake. Motor was refreshed this winter (rings, bearings, new cam, etc) and I haven't taken compression readings since then. But they were about 165-170 (except for two) when I did compression test before getting work done.