Moparsmitty
Well-Known Member
And where ya gonna bolt a shoulder harness too? I suppose it could be done to the pillar separating the doors, but it wasn't designed for that....but it could work.
www.wescoperformance.com/retrofit-seat-belts-shoulder-mt-door.html
This is just one place that you can get a kit to retrofit seat belts/shoulder harness into older cars. Although I haven't seen these installed in a 64 Plymouth, I've seen them in other cars (mostly 55-57 Chevys) and the look good. They don't look too tough to install.