Need help with a logical plan

Wow ,it looks like someone`s already put on the post 72 disc system with sway bar. The rearend you have there appears to be the 7.25 which would certainly need replacing if you add more hp. It looks like your leaf springs are heavy duty. Your steering coupler could use a new seal or maybe just reattaching. The brake lines in the front should have gravel guard on them which will appear as if the tubing is encased in a spring. Just some insight from your pictures. HTH.