Pinion angle question

RustyRatRod said

But consider this. When it's in the car, how do you know "where" the perches are in relation to level? You're going to have to move the rear axle out of the way anyway to level up the springs where the perches sit, so why not throw it on the blocks like I described? It's just easier all the way around, IMO. Not that it amounts to much.

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Yea I agree with you I was looking at it again and the perches are nowhere near level. I reentered it took some more measurements for my backplate to perch and I'm just take it back out and put it on blocks and level i just didnt want to pull it back out that sucker is heavy and I'm on the dirt so there is no sliding or rolling it. Its pulling and tugging and lifting haha
How about this? Just brain storming. Say I measured the degree of the leaf spring where it meets the perch. Let's say its 4 degrees from level. Couldnt I just add that 4 degrees to the 5 and set it at 9 degrees?