C Notch and centering wheels in the fender question

[Belairbob]

Hey, I'm thinking about a mild C-notch but I have read somewhere on here about moving the trailing arm crossmember 1" toward the front so the wheel will end up centered in its opening when lowered. I would lower aprx. 6" in the rear. What do ya'll think? Would the mild C notch our vendors sell allow me to move the rear up 1" without problems?

Thanks!
Bob