Leaf spring relocation - shackles to frame

With mini tubs and springs done I have 275/60/15, and have gobs of room for more tire, at least 2" per side 325 would be no problem, I never understood why the factory put those stupid pinch seams in there in the first place, it's a waist of space. Problem is if you do mini tubs, then you may as well do the relocation of springs, they go hand in hand

Jeff