I can't seem to find any dates or numbers on the head so I thinking it must be an earlier model. According to the engine code link from
JeePete ('http://www.amcrc.com/tech/engine.html'); it could only be 1969, 1978 of 1982.
Being that theirs no dates on the head (this is assuming block and head are of same year)
ItÆs not an 82. Now correct me if IÆm wrong but I donÆt thing the 258 was made in 69(?)
Yesterday I was able get a valve cover gasket that fit, it was for a 1980. According to the engine code itÆs not an 80. so I thinking its a 78 because (again please correct me if IÆm wrong) IÆm under the impression their were no changes between 78 and 80.