A Body Rear Relocation Kit Brackets

Do you have to re drill the spring perches for the offset ?
I'm interested. I do wish they had the 3/8 threaded studs swedged or welded in.

Are you talking about the holes in the body?
I can weld in some studs or bolts for ya but I left it like this on case you need a new bolt. Never had a problem tightening or loosening .