Any good 3-point belts?

[The_G1234]

I'm looking for some shoulder belts for the rear bench in my 75 valiant, 4dr. Does anyone know which ones fit the best and how to mount them? So far I'm looking at a SeatBeltsPlus universal belt that I'd have to drill holes in the floor and C-pillar for.
Thanks.

 

[matthon]

I can add this, I bought lap belts from them for my wagon, nice belts.

Planning on buying 3 point for my a-body, haven't looked at them yet though.