CPP 67-72 brake booster kit

[57rookie]

I would like some opinions if it is not too much to ask. I am thinking of ordering a power brake booster, specifically part 196772BB for front disk/rear drum.
My 1971 GMC has front discs but never came with power brakes. This seems like a pretty clean kit with the booster and the proportioning valve.
Anyone have experience with this kit.
I gave up on junk yard finds as I need the firewall bracket and there are no 67-72 trucks in the junk yards out here that I can take one off of so I have to buy new.......