Where would you guys recommend getting a rebuilt power steering box for my 69 roadrunner? And is it worth upgrading to the firm feel police box?

The 2 main rebuilders that I know of are "Steer and Gear" and Firm Feel.
I have a stage 3 box from Firm Feel in my 70 Charger. The effort is between a manual box and a standard power steering setup. More feel, but with the power assist you need. I added the fast ratio pitman and idler arms, and my turns lock to lock went from about 3 1/2 to about 2 5/8. Fast action, moderate effort, maximum fun!

I have the Firm Feel Stage 3 in my Coronet and love it. I decided to try the Steer & Gear stage 3 in my Satellite and it's okay but not as firm as the Firm Feel. My vote- Firm Feel Stage 3.

I was thinking about switching to the later large sector boxes because of easier availability and cheaper pitman arms. I can get an a-1 cardone box form work, but the pitman arm is more than the box. Is this a bolt in swap and what year/model box do I need?