7 1/2 axle swap help.

Thanks Gents, appreciate the help. Kind of shot down my hopes for a easy one hour axle change but no worries. Better to take the time and do it right. So to escape spending time worrying about keeping the axle perches in the same spot have you guys ever seen or installed the leaf spring relocation kits? and if so are they worth it? eventually i hope to Mini tub it but at the same time i only have a few weeks in the states every year. so i don't really want to waste precious time on that now.