[RayJ]

Yes, the 9 inch one. You will notice that even though the 9 inch booster is used, there is still a small indentation in the left inner fender for clearance. I was able to get a used A body system (71 Monte Carlo) including backing plates, spindles, rotors, calipers, prop valve, booster, master cylinder, and brake lines down to the prop valve for $350. I was able to turn the rotors and use the master cylinder as a core for a rebuilt one. I had the booster rebuilt and plated. Other guys have been more in favor of buying a new system, but they cost about $900-$1000. I recently posted a pic of how my proportioning valve is mounted. See "Brake System Question" by Bulldog on page 2 of this forum section.