that's an odd size. why not just 35" and stay stock rears, upgrade your axles, and go easy on the go pedal?
what are your plans? street only? weekend wheeler? full time wheeler? these are questions (amongst others) that need answered when considering going full width or not.
if ya have a heavy foot and plan on wheelin it hard.....1 ton full width beef is the route you probably want with that setup..
more details mang!!!! what are you wanting to build?