disc brake problem

[get regal]

I have a question for you guys . Ijust got a ford 9 ' installed in my car it has disc brakes does anyone know of a big bore master cylinder that would work .the brake feels spongy and i was told I need to change the master cylinder .Iwould also like to remove the brake booster . any suggestions would be greatly appreciated thanx. the car is a 1978 regal

 

[85t5mcss]

The 85-88 Monte Carlo master cylinder is a big enough bore to handle it. The prop valve is questionable. I know Camaros will work with disc brakes in the rear (obviously) so u may need a diff prop valve, too. I've heard the story both ways on this subject and I haven't got my rear disc in yet.