Here are the shop manual pictures/info.
http://chevy.oldcarmanualproject.com/shop/1948_51truck/51ctsm0102.htm
Front bolts/pads/rubber inserts for rear shackles.
https://www.classicparts.com/1947-49-Cab-Mount-Kit see part 35-110
Here are the rear parts with shims/locks/shackles.
https://www.flickr.com/photos/advance-design_parts_co/8129510232/in/album-72157631868452754/