18 Tundra brake issue

Having an issue with my front brake calipers sticking. Truck was wrecked (not by me). Sat for a year and now getting it fixed. When I remove the hose from the brake booster the brakes release.

I have already replaced the following:
-New OEM calipers, rotors pads pins hardware etc
New oem brake booster
New oem master cylinder
New oem check valve

Not much left besides the abs…

Are there any other check valves that could be malfunctioning causing the calipers to Not release?

 

Clogged line? Video below shows how to troubleshoot.

https://youtu.be/MQ0zsaDOVD0?feature=shared

 

You sound like you know what you’re doing, but just to make sure did you accidentally let the MC go too low when bleeding? I’ve also heard of bad MCs even when new.

Like said above, check hard lines for a pinch since it was wrecked.