spring relocation

I am in the process of doing a spring relocation and mini tub, removed passenger side wheel well today. Just started process today. I was just thinking about when I weld on the new spring perches, if I use the upper front mounting hole to mount leaf springs that will be one inch above stock, do I need to do any thing with the differential housing angle or can I just weld the perches in the same spot as old ones only 3" in to the center. Hope that all made sence! Didn't know if the one inch would make a difference on the pinion angle. Thanks Jared