My 79 dually is the 10,000gvw camper special. It has something ive never seen before and ive had 4 of these duallys. In the bed there is two dampers or shock absorbers that run through the front of the bed and attach to the back of the cab. What is the purpose of these and is there replacements available anywhere. Both of them are broke off. According to the build sheet these are factory option as part of the camper special but ive never found an explanation of what they're for.