With long rear overhangs on the typical gasser, I'd
first install a rear track bar if you're trying to get rid of some of the steering corrections associated with cross winds and passing trucks. I installed a BlueOx TigerTrac on our 'A' and it made such a difference in handling, we've forgone other 'fixes' some do to their MHs. The rear track bar cuts down on rear body 'tail wag' and greatly stabilizes steering. Bob
BTW, we also installed a set of Koni FSD shocks that helped as well...YMMV.