okay okay stop laughing ,
lol
this is no perfect example by any means, just a proof of concept, max says instant center should be approximately around the grille of the truck , represented by the two intersecting lines I have along the bars of the four link.
the top bar being longer than the bottom allows an extreme angle almost 90 degrees yet mounted at almost the same location on the frame by distance rom the axle.
Another good idea for a minimal travel set up like bag over axle is parallel four link with watts link.