What master cylinder with hydroboost ?

Hi all

I'm very disappointed with my braking after rebuilding the front brakes and installed new rear discs
pedal is very hard and not enough force
i understood that with my performer cam (not enough vacuum) and my 20 years old mastervac and master cylinder are causing that
i decided to install an Hydroboost and a new master cylinder
here is my brakes
- 15'' wheels with 225/65/15 tires
- front 11'' rotors with calipers with single 27.559'' piston (70 mm)
- rear 11'' rotors with calipers with single 23.622'' piston (60 mm)
- new 3/16 brake line
- hydroboost will be installed directly on firewall with 6.5 pedal ratio

I plan too to install a new power steering pump and steering box so all will be new
the new power steering pump will be deliver 1250 - 1350 PSI

I've remove the rear pressure valve on frame and will install a disc/disc proportioning valve with the future new master cylinder
I hesitate with 1'' / 1.032'' or 1.125'' aluminium Mopar type or Baer but it's more expensive

What would be your advice about type and the size of master cylinder ?

many thanks