Marmon-Harrington. I know where there's a set for sale in Nipomo, CA. Yer gonna be wanting a transfer case from the same class of truck. Owner of the axles may be able to help with that. PM for details.8V71: in for a penny, in for a pound.
What front axle would do well under that?
Well, take sounds like it could carry the V71.irHunter,
If memory serves the 2004 and newer F550's come with a wide track Dana 60 that is upgraded to handle 5, 6, or 7000# depending on the configuration. The standard wheel configuration on the newer F550s is 10 lug 19.5 rims.