Maybe you should pull your alternator cover and verify that your cams TDC marks align the same as the TDC marks on the crank? If so, and the pretension is enabled on the cam gears, you should be good to go and you will get the true readings per valve/cam gap. Our engines are referred to as interference design, mess up the timing and things collide, or as my dearly departed father would say, "Son, looks like the wigglin' pin ain't right with the wobblin' box".