You realize that any power booster just supplements leg muscles, and doesn't improve brake efficiency?
We spent decades tossing the booster, and using a smaller bore Master to improve the "effort" needed.
Just saying, - they're only 3000 lb cars.
ok, this I can look into, would it be the one used on later years. Once again though, its a tight fit, so if its any bigger than what I have now, I'll need to get the hammer out !)