My '83 Ford Ranger clutch won't release?

It started by getting hard to shift into third gear when driving. Soon after, it wouldn't release whatsoever. Got new cylinders. Bled the system for three days. Got another set of new cylinders and bench bled it. Didn't help. The pedal feels mushy. Took the tranny out. No spring loose from the Clutch as some mentioned might be the problem.
Everything appears to be as it should be. Any ideas?

Its not defective slave or master ford rangers are notorious for bleeding that system. Sometimes we've did it in several minutes sometimes several hours. Keep bleeding. If you can find the bleeder tool that's used for bleeding brakes will help

Explain in more detail please.