Need advice from a good body/frame person

One of our trucks is a 1994 International Eagle with a Rogers aluminum dump body. Over the past month, I've found the following:

Right rear leaf spring broke a leaf and cracked a shackle
Left rear leaf spring cracked rear and center hanger
Cracks to the lower dump cylinder mount on both sides about 12" long, not at a weld
Cracks to the lower dump body in the front near the frame where it has supports that go at 90 degrees to the frame - there are three on each side, all three had a crack clean through not at a weld.
Dump body sticks when lowering at times as it approaches the frame and either slams the last few feet or once we had to pull the truck forward to wiggle it off whatever was sticking.

Basically I am starting to think something is twisted in this truck. It also lost the power divider and front carrier assembly, though this may be unrelated. I'm not a body tech at all, though, I strictly do mechanical repairs, but I need to know what advice to give the owner because there has to be some pattern to this. Any body techs or just people that know about this sort of thing have any advice for me or know anyone good in Baltimore? Thanks.

 

Thank you - one of the things I should have mentioned is that the hinges wouldn't take grease and looked a little funny so I measured them and the spacing between the body and frame hinge was irregular, like the body portion of the hinge was angled. I didn't realize it would cause all that, but geometry was not my strongest subject. I called Rogers and they confirmed my measurements are off, and they sell either the body portion with bushings and hinge pin for $250 or all that with the lower frame portion for $400. I'm going to measure the frame portion when the truck comes in tonight to see if that is twisted at all or if it's just the bushings. They didn't feel there was any reason to replace the lower portion unless it is bent - is there anything else I should look for or any reason they may not have told me to replace the lower portion if it measures good?

I do have a plasma and a welder with a spool gun and aluminum spool already, I've been using it to weld the cracks so far, and can use it to install the hinges. Other than ensuring they are installed at proper 90 deg angle to the body, anything else I need to worry about when replacing them? Thanks again.