#1 You don't have to high of compression.
#2 with a mild performance cam you should be around 18-22° initial and 34-36° all in...
Finding out why #2 isn't the case would be my #1 priority...
While throwing bigger head gaskets and cams would lower your compression that's not your problem. Definitely not your carburetor and likely not your distributor...
Right now I'm starting to question your timing light? Is it a dial back and you're not reading the dial?...
