Need some suspension/chassis guidance

Knowing what you have right now for a rear axle would be helpful for determining which would be the most beneficial way for you to go. For example, if you have a 7 1/4, nobody is going to tell you to waste money narrowing that. Assuming you have an 8 3/4, which one, A-body SBP or BBP, B-body? How much are you willing to spend? What tools do you have access to? Can you weld? Are you planning to do all the work yourself? Have you ever done a 4-link before? Those are just a few questions I came up with off the top of my head.

Yes it's a 8 3/4. I believe it's a B body rear. I'm trying to keep this a low budget as possible of course as this is mostly a street car I want to have some fun with. But I know I will have to spend some money. Yes I can weld and do fab work very regularly. I have a good MIG and a TIG. The only thing I don't have is a plasma cutter or a bead roller. I have a torch etc. I haven't done a 4 link but i'm no stranger to fab work. I've done my fair share. I plan to do as much myself as possible. I will probably have a guy I know narrow the rear as he is more qualified than I am at that. I'm not afraid to send stuff out if need be. I.E. I have a paint guy for my shop as I'm not experienced enough to do the paint work I need sometimes at my shop.