Panhard, Diagonal Link, or both with ladder bars?

No ....those IMO do not give much cushion and you will hardly notice any difference from a regular heim. The ones for street I suggest are rubber bushed. I will dig them up later.
I don`t think I`d use rubber on the panhard bar, probly good advise on the rest tho. I didn`t have room for any lateral movement on mine.????????