clearance

Thanks for reading, everyone. I need some help troubleshooting a hard contact "bang" noise when my 87 GN goes through a steep dip (for example a transition joint on the highway between bridge and pavement). It only happens when the car has 2 or more people. The noise sounds like it's metal on...

I'm usually able to find out what I need to know by using that magnifying glass box thingy but this particular setup doesn't appear to produce much results relevant to what I need to know before I fork over the $$$. I posted my question in the Ridetech install thread Scott posted but I'm ready...