I was looking at your project pretty sweet why are you using that rack the olds Brvada came with a rack, the streeing shaft is relocated to the middle of the diff case. But if you must use that rack the steering shaft must come stright up to the upper frame rails the over with bearing-style steering universal joint with splined rack adapter joints and rod ends to support the steering shaft with the custom fenderwell you will keep it clean under the hood you might have to use a under dash master cyclinder with a 90 drake padals.what is the ride height? and you know that all 4 tires size must be the same height.
