Will 76 seatbelts fit my 74 Scamp?

I have been trying to find seat belts for my 74 Scamp with bench seat. A member has a set for sale from a 76 Scamp with bench seat. Does anyone know if they will fit my 74? I know my 72 Swinger belts are totally different. I bought my Scamp with no seatbelts. I would like to be able to just bolt them up in the existing mounting holes. Any help would be appreciated. Thanks. Randy.