i have a Baja bug with an a arm front end that is complete but now I am laying out the back shocks. I understand to set the shocks at 90 at full bump.i am running 14" co and 16" Hp. My question is when looking directly at the back of the car from the engine do the shocks need to be 90 to the arms pivots or can they be set at an angle. If so how much of an angle is ok. The arms are approximately 8 by 8 and there is roll cage under the window fabed by the person who started the car. Thanks for any input.