help hard break pedal weak breaks after swap

A hard pedal has nothing to do with bleeding, this indicates that they are BLED JUST FINE

Hard pedal, poor brakes:

master too large bore

booster bad or not enough vacuum

restriction in line(s)

shoes not properly fitted to drum (drums turned out too large, shoes contacting only center of drums, lining glazed due to this, shoes need "arced" etc )

shoes/ pads glazed, not properly broken in, wrong material

Some time ago someone posted some info, I think from year one, on the various types of metering/ switch/ distribution/ combo proportioning valves used. I would think that there is room for trouble in these, things like or rings deteriorating, etc