74 Charger Brake Booster / Master bore size

Shopping for a brake booster / master combo. Car has disc/drum. I need a little help...
1. There seems to be 2 bore sizes, 1" & 1-1/8"... which is best or correct or will either work?
2. Single or Dual Diaphragm? Will either work?

Looking at one of these two...
https://www.mpbrakes.com/booster-ma...es.asp?catid=4F5DE211EDE94D019649077254C4D88B
or
https://leedbrakes.com/i-23439077-8-inch-dual-power-booster-1-1-8-inch-bore-master-chrome.html

I had a quick look at both and I think I would go MP Brakes as their kit has the repro copy of the standard lever system.
Go with 1-1/8" bore and dual diaphragm.

For what it is worth. The Ram Man has an exact copy of the factory Bendix dual diaphragm booster and Hemi master cylinder along with the exact reproduction of the factory power brake lever system that he sells for $525 with free shipping to the 48 states.
I fitted this kit to my own car and it was a great fit and worked awesome. The brake light switch on the MP system you might have a slight issue getting that to work correctly, but I am only guessing going on the shape of their plate/rod to the brake lever.
I know some people have an issue with him but I have bought 2 kits and parts off him and he has been good to deal with and the kits fitted and worked perfectly.

steve340 said:

For what it is worth. The Ram Man has an exact copy of the factory Bendix

Click to expand...

I sent him 2 emails, he never replied to me, figured he didn't want my business.... moved on.. ;)

I just ordered direct off the website with no issues. I have done this more than once as mentioned. I had no problems with reply's or shipping but to be fair that was once I put in an order. He had my order so it was sure fire deal.
I believe his stuff is better - communication is maybe not.