pinion change

ok i got the 4link all tacked into place on the hardbody, i sat an angle finder on the behind/under axle brackets, and at ride height its level -1 degree because my driveway is at a -1 degree slope. i jacked the frame up a little past the max extension of the bags and it changed to a like right at .5 degree. when we laid it out it changed to like -2 degrees. his ride height is pretty low, so 1 degree off when hes draggin, and like 1.5degree off if he was to ride all the way up, which im sure he wont lol. does this seem right?