[QUOTE=noglider;9318444]So are you asking if it's from 1976 or 1986. Definitely closer to 1976.
Based on the color it's a '77 and the serial # it was built mid '76. The real question is, if it's not 531, why the serial #. But it's all academic, it's a really cool mixte to play around with. Thanks for the help.