Update: I ended up rebuilding my entire brake system with new lines, hoses, wheel cylinders, master cylinder and a rebuild of my hydrovac.
Unfortunately, my hydrovac had some bore defects and is leaking brake fluid past the seals again.
I am now planning on replacing it with a hydroboost system as user 3B suggested. I have sourced a rebuilt hydroboost unit and PS pump. The hydroboost unit is the newer style found in 1980's and up GM trucks.
Can anybody suggest a dual master cylinder to work with a hydroboost and my brake system?
My original master cylinder is a 1.125" bore.
I have Wagner type F dual front wheel cylinders. 1.125" bore
The rear is a Twinplex dual wheel cylinder set up. 1.5" bore
