82 diesels were CR, early 82 were mfg before december 31 1981, (august 1981). late model 82 were also CR, typical bait and switch middle of model change. starting roughly january 1982 (up to august 1982)
early = 11mm, late = 12mm. both are the same engine code.
check the vin sticker on the driver side door jamb. it can be very difficult to read...
also some say the headbolts can determine which ones, look in the oil fill hole or remove the valve cover. but without very distinct photos or experience this can be difficult to "measure"
CK engines were 1.5D. so the previous post doesnt apply.
does it really matter? only if youre having engine troubles and need a rebuild. considerations to apply replacing the headbolts with headstuds....etc... its really not significant