Stock

Used Blazer Jimmy Sierra Cheyenne K-5 Passenger Side Seat Track Hinge Latch and trim panel 

Should fit the 78 - 87*** you'll need to confirm in not 100% on this 

Was removed from an 84 blazer 

Functions as it should small amount of rust and rot on a couple of the mounting tabs for the floor easy repair includes rear trim panel and all mounting bolts to attach to the seat does not include floor mounting bolts 

see pictures ask questions