I had a feeling that was the case. I'd mentioned in an earlier post, tag has L31 as an option, but no longer on car. Looking to replace them. I have a question for you, does your car have the slotted bumper front and rear?
No, mine has smooth bumpers. So should yours. The slotted bumpers are 1972. They were for the new design bumper jack that went in the bumper rather than under it.