Pinion angle help.

update.. I put rear in car front wheels sitting on ramps and rear sitting on spring perches U bolted (tight but enough to move) with tires on and sitting on blocks. Car level and all weight on wheels , and set pinion angle at 3 *. And I put a 2x4 between the tire and leaf spring on both sides (thinking that would square up the rear). Unfortunately, after finishing up everything I test drove car and There is a noise on exceleration at any speed. I pulled third member took it and had it re-setup, put it back in and test drove again and noise on exceleration. Totally frustrated, I put car on lift and measured left to right between leaf spring and backing plate and found that the driver side and passenger side are not even. Would this cause the Noise ? Or is the pinion angle still off or both? The third member has all new parts and only aprox. less than 20 miles on everything. all thoughts and comments on this welcome.