Color

Matt, the underside was not painted, it was only over-spray. Check this site out for factory markings, practices etc...Although mostly B/E body based, the same practices apply to A bodies. http://www.mmcdetroit.com/Inspection/.

This other site is also one of my favorites for research http://www.hamtramck-historical.com/dealerships/1971PlymouthDealershipDataBook-09.shtml.

All the best,
Giles