old keys

May as well do it. Most Chrysler parts were either GM or Ford primary parts. Take a closer look. For years I delivered parts to all of the Big 3. Being a "Purist" isn't what you think it is. Ford and GM generally engineered the parts, Mopar Co-Opted them for cash. Anyone who tells you otherwise has never dealt with the physical parts.
if u go back and research, you`ll find that Chrysler engineered (came up with first) many, many, of the new developments back in the day !