I bought a 1960 Cadillac series 75, probably a former funeral car. The car came with no seatbelts, front or rear. My question is: Do all of these limos have pre existing mounting points to mount seatbelts? If so, what type will fit with the non adjustable front seat? I have seen seatbelts on standard model 1960 daddy's but there is not much room with this seat configuration. Is it possible to mount seatbelts?