I'm not 100% for sure but I believe that roof molding was part of a regional option package. Back when I lived in Omaha the local dealers sold those. They were called the UFO. Ultimate From Oldsmobile. I can recall seeing a lot of them anyway. IIRC all of them were two tones. White bottoms with a green.red,gold and I think blue upper half.Painted like the 79 H/O and 80 442. The stainless molding wasn't in the parts catalog either. You had to call the supplier to buy one. I did a few hail jobs back than and it was a PITA to get one of them.
Nice car for a plain Jane. Does your car by chance have the aluminum radiator support,aluminum hood and trunk lid? Bumper supports should already be aluminum.:smile: