Ok I have a direction now I just scored an 1986 motor home on a p30 chas. for a $100. Motor trans. and a/c units are gone. My question is on the swapping of running gear on the front when I narrow the cross member to fit my frame (46 frame tapers in the front) do I narrow the new one to fit the frame or cut it straight and shim in the front as needed? My thoughts are to fit the taper and just align the wheels. The independent suspension should still work although they are angling forward a little. I know its been done so Im open to any help and knowledge