Rear seat belts ?

Do the rear seat belts attach to the floor, or higher up on the rear tunnel? Juliano's site isn't very clear on that one.

 

The newer c****ats have a base that you can leave in the car when you take the seat/carrier out. The base can be attached with it's own belt. Check out a new car and feel beside where the lap belt comes out. You will find a couple of u-bolt type bolts that the base belt clips onto. The carrier just snaps into and out of that base.

The other belt that some c****ats have as the twins get older will have a belt on the top that clips into an eye-bolt type of clip to keep the seat from tipping forward. Again if you check out a newer car you will find these clips in the area under the rear window.

 

As far as 3 point belts in the rear, try this:

Some Ford vans and Plymouth Dusters use a ring on a tether (short length of seat belt) hanging from the roof to properly position the upper end of a shoulder harness. The belt runs from the lap belt connection up through the ring and then down to a solid anchor down low on a post or the floorpan. The tether is bolted with a normal seat belt bolt into a captured nut on the roof reinforcing and the lower mounting is just what you'd expect.

 

I sell racing belts and I'm also a bit of a safety nut. The belt and it's mounting bracket should be in line with each other. The more angle there is at that junction the greater the chance of belt failure. I see street stock/hobby stock guys running their seat belt mounts up to 90 deg. angles.

 

I don't know if they were doing it in 1959, but by 1961 GM was putting little dimples in the floor pans to show where to drill holes for the seat belt mounts. I have a dealer's bulletin for my '61 Bonneville that shows where they were. They did have three separate sets of dimples, both front and rear. The dimples aren't very big, about like what you'd make with a center punch at home, so you have to get the floorpan clean and look hard to find them.

I bought seat belts for my car from http://www.ssnake-oyl.com/; they weren't cheap but their belts are top quality.

 

Very nearly any car made in the last 10-15 years has rear three point belts in the outside seating positions and most if not all use inertial reels for those rear positions, either mounted down low on (as in behind the seat) on the C pillar, or attached to the sheet metal of the package tray (down on the rear seat bulkhead in the case of droptops).

I would think a little creative junkyard shopping would provide all the matching belts, bolts, bits, and hardware for an entire interior. You should be able to keep everything in the family (GM, Ford, Chrysler, Ricer, etc.) by pulling everything from the same car and even have marque matching emblems if that's your thing.

Just take care to make sure the webbing, s***ching, and hardware still looks new, unfrayed, and unsoiled, and you should be fine.