IF you have power steering, our second gen system # 3022 will allow you to retain everything exactly the way you currently have it set up, yet will absolutely knock your socks off with the increased overall braking performance:
http://www.hydratechbraking.com/GM_2ndgenF_Body.html
If you are currently running a factory style vacuum booster, you wouldn't even have to touch brake fluid to install the system - only a back to back brake booster swap out (disconnect the existing master cylinder from the vacuum booster, then move it forward and over just enough to swap the brake booster out while leaving the brake lines still connected to the MC). Once the replacement hydraulic brake assist unit is bolted to the firewall, then just remount the MC back onto the face of the replacement brake unit, plumb the lines into the PS system and you are good to go!
The gains in performance are stunning, and will not have to fuss with wondering if a different brake package will fit behind your existing wheels.