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Changing the opinion angle in front is a bad idea because of the steering etc.
I've never hears of anyone changing the front opinion angle even with 8" of lift. Its addressed with a double cardon joint Drive shaft



while i do with this,I have had the knuckle yokes cut loose and rotate the pinion up some keeping the alinment specs stock.

the 2 studs and 1 u-bolt are the trouble spot but a wedge shim got it bolted up and worked out fine.

I have had to use a double cardan joint on both ends of a rear shaft in the RC and done that a few time with other 4x4 rigs.

no telling what was moded on the front with a double shock hoop and shackle swap.