Mopar Bumper Jack ID Help!

Could someone school me on Mopar bumper Jacks?... or post a link, I have a 72 Dart, I'm not a fan of bumper jacks, so I took mine out of the car 9 or 10 years ago & put it up, now I have 2 bumper jacks & don't know witch one go's to it, I have one black bottom, one gray bottom, one jack part with no numbers & another with numbers that's taller then the other one!... I"m thinking the shorter one would be it & black bottom!