I’m a novice when it comes to timing but I’ve been doing a lot of reading and research on the subject. I bought a timing light because I’ve been curious and also have had idle issues and stumbling/bogging trying to drive at an idle. Today I hooked up my timing light and fired up the engine. I initially left the vacuum advance hooked up and it showed 12 degree advance at idle and 36 degree under load. I was under the impression that this should roughly be what the advance is with the vacuum disconnected. So I disconnected the vacuum and my advance dropped to 2 degrees and full advance was around 24. Ran like crap. Can my timing really be off this much and is this why it’s running poorly at times? This engine had a complete overhaul last fall so I didn’t expect to have any issues. Also, the cam is 218/226 @.05 with .48/.48 lift, 108 LSA. Not wild but kind of choppy.