DADS,
Those are just the types of pictures I was looking for. I really like the three point harness for later. My seat frame on the 59' is a little different, but I can weld some hooks to the cab floor to address the infant seat and then use the lap belt as others have suggested as well. I'll post some photo's once I have it figured out.
Here's a link to the bottom of the seat base on the 59' Apache.
http://swenracer.smugmug.com/Trucks/59-Apache/i-pHFsLXJ/A
