Bought a 86 k10 that had set for about ten years . I’ve got it running again but the clutch just goes to the floor. So I’ve got a new master and slave because both are leaking but tried moving the clutch fork and it was stuck . Took a hammer and just tapped it to free it up (probably shouldn’t have) it’s has some movement now but it only moves towards the front of the truck and not towards the rear . Seems like the slave can’t fully extend to disengage the clutch .