idragmazda
+1y
on a 2 link when the suspension travels your right the axle moves side to side. if you want no side to side movement you need to run either a watts link or a triangulated forward four link. thats why 2 links suck they provide shitty articulation for you without causing serious movements right and left, thast why they really should not be used on such an adjustable suspension where the travel range is so much. a triangulated 4 bar is built for this type of suspension, same with the watts link.
and your idea of that center piece keeping from lateral movements makes no sense. think of it this way: since the piece is welded in near the axle it keeps it the 2 bars aligned there, but what about at the frame? the bars are long, they will bend left and right because of the force of the truck moving forward and during turning. the longer the bars the more it will move right and left. You have control of the rear end along the line of the movement of the truck, but no lateral control of the rear end because there is nothing to stop it from jumping left and right.
do yourself a favor and do a triangulated 4 link, or a 2 link with a panhard or watts link
if your not going to take everyone's advice then oh well good luck building shitty suspensions that are dangerous and hacked, we're only tryin to help you out.