Adjustable cams In a J head

I do work on my bike but hell I stayed at a holliday inn once . I just act like I know what im not doing right fricken bike goes like a bat out of hell the way I have it set up < but just want to degree them and see what I have it set at. Now back too the exhaust cam doesnt move>

I built a gig out of an old valve cover, was always told of the 2 degree difference. So being curious (anal), tried degreeing first without the gig then with it. Got a 2 degree difference on the intake but only a very slight difference (if any) on the exhaust. Tried it a couple more times, on the same and other J motors with the same results. But definitely a gig is the best way.

don