During shooting, Clint Eastwood sustained what he describes as the worst injury he has ever had on set when a horse he was riding fell through thin ice and launched him forward. Clint suffered a dislocated shoulder.
When Stockburn arrives in town, Coy La Hood describes the Preacher to him. Stockburn appears unnerved and says quietly, "That man is dead," perhaps hinting that he had killed him or watched him die before. Clint Eastwood revealed in interviews that his character is in fact a ghost.
Despite the notorious financial and critical failure of Heaven's Gate (1980), the Hollywood film industry within about five years of that movie revived the oater movie genre during the mid-80s producing a mini-cycle of Western movies of which churned out such Western oaters as Silverado (1985), Rustlers' Rhapsody (1985), Pale Rider (1985) and Lust in the Dust (1985).
In the scene where the bullet scars are shown on the Preacher's back there is a pattern of six shots. Later when Preacher engages Stockburn, Preacher fires six shots into Stockburn in the same pattern. Preacher then ups Stockburn with one shot between the eyes just as Stockburn had done to Spider.
The "Preacher" character played by Clint Eastwood is never known by any personal names. According to trade paper Variety, the preacher is "so dubbed because he initially appears wearing a clerical collar".
After Richard Kiel gets hit between the legs, preacher helps him back to his horse. You do not see this but Richard, due to back problems, had to use a step that was on the side of the horse to get onto his saddle. If you look you can see Richard take a step onto the platform before getting on the horse.