I am trying to find the correct angle for my rear spring perches. The truck is an 87 runner with stock axles. I have dual cases and the Marlin 5" lift springs for the rear. Currently I have the axle housing ground smooth and was attempting to locate the correct angle. My rear driveline has a CV in it. I do not know what angles need to match. I mocked it up, and with the top of the housing being 20 degress and then set the perchs at 0, it looked ok to me. Any help would be great. I did look through the FAQ's and either missed it because I am a retard or it is not there, Thanks in advance, J.