Guess you missed the search button above since this has been covered in other threads
Remember in searching for topics not to narrow down the search too much. Like one might want to d in this example and include the word "Shelby" since the Mustang shared the same driveline in this case
https://www.concoursmustang.com/forum/index.php?topic=3121.msg16697#msg16697For you or for others reading this thread there are also a couple of threads on restoring original drive lines/shafts and an article in the Library on that also
Those codes are also listed in an article in the Library under each years section. Look for
Paint Marks - The Basics Examples and codes are towards the back of the article. Lavender can sometimes take on a more pinkish look in some original examples.
CH, LA, WT are simply Chartreuse, Lavender, White