Do you have dual cases?
What kind of caster are you running right now? Personnally any more 6 is not necessary. And if you rotate you pinion 5 - 10* it would be looking that the sky.
Post a photo please, just trying to help you so you dont do something thats not necessary.
I run 5"s of lift dual case and a high pinion. Caster is 6* and I could add about 1 or 2* to the pinion to make it perfect, but I dont need to.