Bad master (brake cylinder)?

[2003SV]

Not sure where this topic should go so apologies in advance.

I just tried to bleed the brakes on my Shell Valley Cobra (it uses GM Intermediate discs and has 2 master cylinders, one for the front brakes and one for the rear brakes). I hadn't run the car in about 2 years and one of the master cylinders (for the front) looked to be nearly dry. I added fluid and then tried bleeding with the help of my pit crew (wife).

I can't seem to get air from the front brakes... I bet I filled the master cylinder up 5-6 times. I'd have the pit crew press down as I opened the bleed screw and she'd hold the pedal until I closed the bleed screw. I was careful to ensure the master never ran out of fluid and topped it off, each round of 3 presses. I couldn't seem to get air out completely from the passenger side and so I switch to the driver's side. And it was the same thing. After 3 fills of the master the driver sides still coughs up air and I gave up.

I bought the car used and so it could be this master (Wilwood) is ?18 years old...

I'm guessing this master is bad... would you agree?

Thanks in advance.