Pop/Clunk with Chassis Flex? - Check Your Skid Plates

I only used rubber washers on the skid connections. I used thin nylon washers on my bumper connections.

 

Update on the skid noise problem. The upward bracing posts of my RCI engine skid were scraping the frame front where they abut. So I placed some wide, thin rubber washers on top of the posts, used my floor jack to lift the plate into place, thereby holding the washers atop th e posts, then tightened down with thin rubber washers between steel. Photo example below.