Question for Everyone

Hey everyone, lately I've been trying to figure out how much my 1968 Chrysler 300 was new when my great great uncle bought it in 1968. The issue is the window sticker is long gone. I have been trying to do research to find an old dealer build sheet showing the prices of each option so I could figure out the price of the 300 to no avail. Could anyone help me figure it out? It would be greatly appreciated.
Author: Garrett