Sounds like you must have a 47-55 1st series truck. There are guys on the forum that can tell you what year they went from a verticle bolt through the rear mount to the the slanting crossmember and mount. Do you have tube or lever type shocks and does the frame have a distinct kickup over the rear axle (47-53) or is it nearly straight (54-55 1st). All this will help them narrow it down to the near exact year.


Evan