Welcome to the CRG Discussion Forum!Forum registration problems: Make sure you enter your email correctly and you check your spam box first. *Then* email KurtS2@gmail for help.
Thought the mtg. holes on the front side of the upper rail for a/c started in 69. Little dimples were added along the top rail and have seen on 69's but not 67 or 68's. Service replacements have them. Do a search and you can find info on differences.