I had the same problem with my wife working the pedal.
Pump-pump-pump-push, nothing. The bleeding went much better when I put her
foot on the middle pedal. You are all sworn to secrecy not to repeat this
story if you ever meet her.
'59 A with a firm pedal
I can't get front or back brakes to bleed on the 72 MGB I acquired a month
ago. I did get fluid once I took the bleed valves out but after rebuilding
the calipers: no fluid. I haven't gotten any fluid to bleed from the rear
brakes. How do I get the fluid to flow?