73 GMC 2500 Hydroboost/locked brakes after hose replacement

[73FrankenTruck]

UPDATE:

So I finally got around to this. Put the truck up on jack stands, went through the bleeding process. Before I set it down, I noticed I could spin the passenger front tire, but not the driver side. I cracked the bleeder valves, and it seemed to help, but I think I was just delirious from frustration. The driver side caliper would not budge.

I'm wondering if I botched it up pumping the brakes repeatedly while thinking I was bleeding correctly. Regardless, I replaced the calipers and pads. I went to replace the rubber brake lines since that seemed to be a recurring piece of advice. Nothing from the parts store would match up (not my first headache in obtaining parts for this mismatched build). I ended up getting some made ($25 for both) to match the ones I took off.

Everything seemed to be great. Truck moved, ran, and stopped. I noticed the next morning that as soon as I started the truck, the pedal was HARD and I had no power steering for about 3 seconds...then everything was fine. As I drove, the pedal would have a ton of travel, really soft. If you pumped the brakes, it would be normal again. The only thing I could think was I had fried the power steering pump (again, while I thought I was bleeding correctly with truck on ground). I rolled the dice at the parts store without taking my old pump in. Of course it wouldnt be the right pump. Back to match it up. With minimal automotive knowledge, this is fast becoming the most frustrating part. Pump replaced, did both belts while I was at it. Rebled power steering again.

EVERYTHING WORKS.

I know these are simple tasks for most everyone here, but I cant even begin to explain the relief I feel now. Now onto fixing all the other BS that I have no idea where to begin with. Thanks for everyone's advice!