[PGSigns]

I would still look at the angle of the drive shaft and see what the working angle is once you move the rear of the trans up. Here is a little math to get the spacer thickness for the rear of the trans to move it up 2.5 degrees. measure from the center of the motor mount to the center of the trans mount and take that number time .017. The .017 is about 1 degree per inch. So for example the measurement is 46 inches you get 46X.017X2.5=1.955 for the spacer to get you to 3 degrees. You can use the same method to get the taper for shims for the trailing arms or to cut the tops of blocks to get you pinion angle adjusted.
Jimmy
Jimmy