How do I remove the headliner from a '84 S10 Blazer to replace the cloth with one of you kits?

The headliner in an S10 Blazer (no matter what year) is removed through the rear gate. You can see how this is done by clicking this link. The headliner boards in Cherokee's, mini van's, Suburban's, Tahoe's, Explorers, etc., -- are also removed like this. If it has a rear gate opening, that is where it should be removed.