1962 Dart seatbelts

[nutz4spd]

I'm looking at installing seatbelts in my '62 Dart that didn't come with any. I was told that all cars had the threaded nut in the floorboard to attach them to, but when I checked under the car there are no holes. Only the bolts from the seats. Is it a good idea to drill a hole and use a bolt, washer, and nut to secure the seatbelts?

 

[topside]

If it has provisions for seat belts, typical Chrysler locations are at the sides of the driveshaft tunnel and inner rockers.
You'll have to pull the step plates & carpet to find them, though a good look at the sides of the driveshaft tunnel is quicker.
If you have to drill, locate the locations carefully and use large washers; typically about 2" outside diameter.
Drill close to the rear of the front seat so the anchors aren't trip hazards getting in/out of rear seat.

 

[Darter6]

Right. Chrysler welded in reinforcement plates along with the welded in nuts on the floor.
I looked thru old photos of my 63-64-65 cars and didn't find any that showed the floor mounts.
Sorry.I will tell you my 64 Belvedere 4 door sedan did have all the mounts and actually had rubber plugs in the nut locations.
When I got the car it was completely original with 7,000 miles on it. First and last of cars this way and I had a bunch.