On this truck, they installed a ladder bar set up so basically it has a 4 link system. My question is, based on the fact that it has the 4 link, should i install a panhard bar or will the spring act as a panhard bar. If not a pan hard bar, should i put a center bar from the top of the pumpkin to the frame for pinion angle? Looking at this set up, i should be able to set my pinion angle with the 4 link set up........here's some pic's that may help in suggestions