Pre bent line or do it myself?

I bought the stainless steel lines. I'm hoping they won't need any major bending. All new components for the brakes. I'm looking into putting discs in the back with my spare A body 8 3/4 I picked up years ago. I think I'm going with an Auburn 3.55 in the 7.41 chunk. I'd like to keep my stock rallye's in 5X4, but I'm learning this won't be easy, or even feasible. Any advice from members is appreciated. Paul.