72 and later marker light welts?

j061093409 said

Here is the 1972 parts book calling for 4 welt’s - notice only under the “L” body style!

Click to expand...

Look again: four for each "L" and four for each "V".
And those aren't bodystyles, they're car lines. "L" means Dart—all of them, whether it be a Custom 4-door, a Swinger, or a Demon. "V" means Valiant—all of them, including Duster.