Sorry for the wild goose chase on the delay valve, Joe.

Find a pipe plug, properly sized, and thread it into the master cylinder front brake line port. Check your pedal with one gentle press. If the pedal is firm, there is air in the front lines/front side of the circuit. Bleed the lines by attaching a hose to the end of the line and pulling from a clean jar of fluid, use the vacuum pump at the bleeder and bleed one front line, then the other. Close both bleeder valves and reattach the line to the master cylinder. Do not try to pump it up, just gently apply pedal pressure to see if the pedal is firm. If so, you're good to go. If just a little soft, bleed the lines again using the vacuum bleeder and gentle, steady suction. Just watch the fluid level in the master carefully, those drum brake masters have very small reservoirs.