The red oxide center section is pretty well accepted as a factory color for the centers. Not sure on the year range but in the end it probably doesnt matter I think it looks pretty good.
Seems like my 73 had a primer colored pumpkin from the factory been so long I cant remember for sure but I did repaint it with red oxide primer. But now its a little lighter colored as I found a spray paint that was about the same color as the red oxide not a gloss more like a satin color but better than primer. I'll have to go check out what brand and color it was for sure tomorrow.
Seems like my 73 had a primer colored pumpkin from the factory been so long I cant remember for sure but I did repaint it with red oxide primer. But now its a little lighter colored as I found a spray paint that was about the same color as the red oxide not a gloss more like a satin color but better than primer. I'll have to go check out what brand and color it was for sure tomorrow.