interesting bit, but if your just doing a soa, not lockering, or gear change, etc... at the same time.
Why do that extra work and just weld perches on top? also my pinion angle changed do to driveshaft angle difference, and if you do a CV you need to set at a different angle as well. I am none CV.
if you could change say your shackle length and use the stock perches flipped axle like your saying, to come out with a right pinion angle per your application, great, but only if your doing a locker or gear change, or disc brake swap or combanation of all above. Otherwise i dont think it would be worth your time.
I did my SOA in the time it would take you to disassemble the rear axle, and start to but it back together.