Shims/shackle Flip/cv Driveshaft

[RSNHELL]

Hey Guys, Need A Little Help. Anybody Use Shims With A 4" Shackle Flip And H.a.d. Cv Rear Driveshaft? If So How Many Degrees Did You Have To Shim It? I'm Thinking Maybe 4 Degrees If Any,by My Calculations To Run At Zero. Any Thoughts?