I searched for a 5.43 R&P for three years and finally gave up. It was an "option" that apparently no one was that interested in. Given that these trucks were built before there was an "Interstate Highway System"...probably understandable.
Mine? A Dana 80HD rear with lots of gear ratios and 19.5 tubeless radials plus spacer adapters for the front (the newer rims have a 1/4" bigger center hole).
Would have LOVED to have kept the original mongo rims & tires but...
Last edited by Tango; 11/12/2014 6:03 AM.