Pedal gets hard half way down, little front brakes

Hi I’m having some trouble with my car 1970 dart 4 wheel drum. I recently had the front end apart for about a month rebuilding it. The drums were off the whole time. Finally got it back together and now my front brakes don’t seem to be doing much. The rear tires lock up first and the pedal seems to get hard half way through travel. I readjusted the front shoes. Gave it a quick bleed at the wheel cylinders. And cracked the lines at the master loose. I did get a couple bubbles from the line going to the front brakes. But the only thing that helped any was re adjusting the shoes. Still locking up the rear tires and only slight nose dive and have hard pedal half way down. 12” vacuum at idle. Thought the hoses may have gotten collapsed internally but they seemed to bleed ok. Is it possible my master cylinder went bad while sitting? Or the hoses are bad but bleed ok? I was going to take the drums off next and check wheel cylinder movement. How much travel should I expect? Any other ideas?
Thank