Car seized up

[bobH]

Jeremy.... long time, no....
What Kube said, Mart said, etc. I don't see that anyone mentioned the 'bleed hole' (by-pass port) in the master cylinder. If it somehow got plugged up with crud, it would give the symptoms of locked up brakes (that would automatically relieve themselves in a half hour). Same as having the push rod too long, covering the port. Last one I worked on, it only had a .040 hole, so it doesn't take much crud to plug it. Easy to check, in place, if you have a .040 number drill to poke in there (by hand).
About stuck wheel cylinders.... I don't have the slightest clue if RAK assembled those with assembly fluid. If he used brake fluid, that would explain their being stuck. Some folks overlook that brake fluid is hygroscopic, and should not be used for assembly.
Good to hear from you again. I hope all is going well.