Can anyone help identify these seats?

[C10 krazy]

Just wondering if anyone knows what these seats are out of?They were in a 68 3/4 ton truck I received but I know they weren't original but the seat frame holes did match up with the truck.They are similar to the 68 buddy bucket seats,but these are highback.The center seat does have a metal storage box under it.All three seats are on a single frame.I would appreciate help if anyone has it.Thinking about putting these in my 72 1/2 ton and would like to know what they are from.I do have pic but not getting it small enough right now.