I am not sure I understand. I am trying to install seatbelts in my '69 and I have found the four mounting locations for the front seats, but I don't know what size bolts are required. I could figure it out by trail and error, but does anyone know the size? Grade? Thanks and Happy Holidays.KevinW said:The bolts are repro-ed, available almost anywhere. The full kits are $50. There are specific bolts for each seatbelt type mounting.