To avoid any problems it needs to be more accurate than +/- .5 degrees. That has a tolerance of +/- .1, so your gtg. Remember use the oil pan rail to set the angle for the trans, and the pinion snubber mounting pad for the axle. If your axle doesn't have one stick a joint in the pinion yoke and measure cap to cap. Don't forget you complimentary and supplementary rules and you should be gtg.