There are many good looking seats out there. Find something you like at a good price. In the cab of a truck you will be able to mount the shoulder/lap combination. In my 57 HT there is no post to mount to so I went with the late model Chevy extra cab with belts built in and they tilt forward to allow access to the rear seat.
Modern seat belts (Not lap belts) are a safety feature that can save your life. What could be a reason not to have them?