Front calipers not releasing

The line above the brake switch in the second photo looks pinched.

IMHO I would bite the bullet and buy new OEM reproduction lines and the year correct distribution block and proportioning valve.

There could still be a lot of trapped air in the lines.even if fluid flows out clear. Think aeration.

Do you know for sure the combo block and proportioning valve is functional?

I got the prop valve the other day from a guy here on town he had it on his demo . But said he had to run a washer there for it to not leak. I tried it without and it seemed to leak a little.

Yes all of the lines are the stock lines and have sucked trying to get them on/off of the different prop valve they just want to strip from being so old..