I purchased aluminum blank corners and cut out the wheel wells myself. Clean, no extra bolt holes or unused fuel filler holes. I also don't care for comp cuts. I've got a fuel cell.
As for travel, my constraint is the upper arms against the tub so that's what I set my bump stops to prevent. I then cut out just enough wheel well to perfectly fit my 37" tires.
One more shot
And unless you have no job, a money tree, and all the time in the world it will take you longer than a couple weeks to properly address everything that needs to be addressed. Every stock mount needs to go, the stock shock/gas tank crossmember will need to go if you want to maximize up travel, and you'll need to build an entirely new suspension around your axle's new position. My entire factory rear frame was cut off and replaced with a new section that I built.