Hi, question. I think I have an orginal 67 z28 rear end. is it actually worth anything more than a regular 12 bolt?

 

Not a lot of 1st Genners on the site any more, but you might get lucky.

 

Parts like that are usually only valuable in context -- if you are restoring a 67 Z/28 to all-original condition, then having the correct rear end has value.

If you have any other situation, then it's value is all in its utility. I don't know what a 67 Z rear end consists of, so can't comment on its value.