CV Shaft or Not?

[JpEater]

got an 86 k10 SB and im gonna do the ORD doubler kit. I want to do the 2" rotated up kit. Will that be a problem with a 6" lift? I know i will need a CV front but what about the rear? If it matters I have a TH400, fixed yoke 205, and 60 and 14 bolt.
Thanks

Trey