If my dusty memory serves me right on some master cylinders they built in and are where the line screws in.
I have included a picture from the factory service manual, drum brake only,
For the hell of it I'll bleed the calipers at 12 o'clock, they are already off with blocks in them.
Oh and we did bled the system again last night, at the master, line lock and calipers and it made no difference. Pedal still had a measured 5" drop when heaving on the brakes.
For those interested in the lines, I observed no measurable swelling. They would "squirm" a little bit under hard application but thats it.
