You should have 3 different marking on the lower sproket one should be a 0 the other should be a triangle and the other should be a sq. and the paper/installional should say 0 is for straight up and the other should say 4 degrees advanced or 4 degrees retarded. If you are going to degree the cam in you would be better off to open up the cam pin/dowel hole to 7/16" and use an excentic bushings and then you can put it dead on to what you want. Most cams today are ground within 1 degree of dead on useing the 0, because they have good equipment grinding the cams. I personally don't use those types of chains. I use the chains with the excentric bushing called a hex adjust, that way you can install the cam anywhere from 8 degrees retarded to 8 degrees advanced
JMO
Zip.