The B&M switch kit says that it mounts to a bracket for a TH 350. I would suppose where the cable mounts. I took a look at that Lokar kit. That would be a clean installation. Not cheap at $67. from Summit but it would be the easiest way out and look the best. My truck has 3.73s too but I'm carrying a little more weight than your A Bone. Gonna need that kickdown.