Here are the stock paint codes broken down by year and code.I believe this is all of them but if I missed one feel free to add on to the list
21 Bright Blue Metallic(1987)
40 White ('84-86, 88)
40U White (upper of two tone)
41 Black
41L Black accent
41U Black (upper of two tone)
53 Bright Yellow (1988)
56 Light Gold Metallic ('86-87)
71 Red
71L Paint, Red (Lower Accent)
71U Paint, Red (upper of two tone)
77 Ruby Red ('87-88)
81 Bright Red
81U Bright Red (upper of two tone)