pinion help

could someone point me in the right way with this pinion angel thing..i took some measurements of my angle and from what i see i dont think its right ....off the trans i have 4 and and off the rearend ( on top where the snubber bolts to ) i have 3 thats with 5 deg. shims that tilt the rearend down.....the way i see it is i have 1 up when added(am i right) im a little confused on this now and i thought i knew it a little better.i know something is not right i can here this thing spinning the tire with a 1.91/1.70/1.71 60' with a 28/10.5 slick track my not be the best but it has been 1.66 and went 7.44..(should i remove the drive shaft and take the reading fron the front of the rearend)