Finally ready to swap out the rear axle in my 41 Plymouth. I did a lot of research here and I'm ready to move forward. I purchased a rear axle from a 98 Ford explorer. I will be putting a 318 and automatic transmission. I've measured the pinion angle and did the measurements for the location of the perches. The axle from the 41 has a angle of approximately 4° and the explorer 8°. My question is this: When I weld  the new perches on the explorer axle do I set the angle to the 41 axle or keep