Camshaft Identification

Set my initial timing at 19-20 and the idle still chugs once in fear. It also bogs down when I slow throttle out of idle. Tomorrow I am going to tickle the initial timing all around and see if that cleans anything up. My hei dist has vacuum advance. Could that be causing any of these issues? Also, it feels like I am getting some detonation when I am around 3000 rpms. Any suggestions.