Not sure it's a 83 ! vent in front cowl is 1970 ish. disc brakes up front, 5 speed, power steering ? photos of interior and dash and motor ?
Looks like she has had body work done in the past, how many km or miles on her ?
Cheers
For non-US market trucks, when heaters were deleted the fresh air cowl vent was added instead.
Was at least an 83 originally from the upgraded center console IMO.
-Geoff