I don't know anything about that particular booster, but yes, people run the JMC clutch and power brakes. The one I remember seeing used a 5.0 booster and 68 MC.
That depends on your model year. For the '65-'66, no. You'll need to get one of the bell-crank boosters, like the Scott Drake one available at Mustang Depot (Las Vegas). This is because the hole for the clutch rod (where the clutch MC will go) is too close to the hole for the brake rod. The '69-'70 has lots of room, so you'll be OK with the SSBC. The '67'-'68, I don't know.
I'm giving this thread a bump. I am looking for a good performance power front disc brake kit that will work with the JMC hydraulic clutch I have installed in my 68. I have 15 inch Tourque Thrust wheels that I plan to keep, so nithing too big. I like the Baer setup and have looked at others like SSBC and Wilwood. I haven't seen any confirmations from anyone about PB setup working with the JMC unit. Anyone have some conclusive info on this? I want to order a brake kit in the next couple of days and want to make sure everything fits without the need for hacking my freshly painted engine bay etc. Thanks.