Three point Seat belts

Plumcrazyfreak said
Do all 70 Dusters have a upper pillar mounting hole for a three point seat belt?

Yes and no. Yes there is a bolt hole. No, not for a three point belt. There were two separate belts at least until after 72. The 4 doors still used 2 belts in 73, can't say for the V?29s.