71 C10 Wheel Size Help Needed

[Thumper169]

I'm looking to install a set of 20" Foose Nitrous staggered high offset wheels on my stock 71 C10 and then doing a 3/5 static drop. Being that I trust the wisdom of you guys more so than the tire/wheel shops I'd like to know if this will work ok without rubbing issues and what size tires are recommended front and rear for this application. I certainly appreciate your time and sharing your wisdom on the matter