upper control arm shafts

[454HO]

Moog lists two different upper control arm shafts for '73-'87. One is straight like original, and the other is a 'problem solver' which has an offset built in to increase positive camber. In what cases would you need the problem solvers? Are these mainly used with lowering springs? If you use the problem solvers with completely stock front end, will there be so much positive camber it can't be taken out by removing shims?

The reason I ask is that I bought a set of straight shafts through mail order. But I ended up getting one of each. Now I'm trying to decide which to keep and which to send back. I will be using BellTech 3" drop spindles with stock springs and control arms.