Just a tid-bit about the Ford E350 and E450 standard wheel base choices.
Last I recall, 3 wheel bases were offered. I don't know what is available for 2021.
- 138" (most often used in the ~21 foot lengths)
- 158" (most often used in the ~24 foot lengths))
- 176" (for the longer)
If the motor home you are considering has a wheel base other than the 3 mentioned, then the frame was modified, either lengthened or reduced by a Ford approved outfitter. The change does not affect the Ford warranty.
On a personal note, I am comforted in knowing that my chassis was not modified. The affected parts from such a modification are stocked well for my rig through the life of my motor home.
Affected parts in such a modification include the following
- frame is cut and welded with additional supporting steel (concern of rust)
- drive shaft
- parking brake cable (if equipped so)
- wire harness
- exhaust system
- brake lines
- fuel lines
I understand that all the affected parts are also Ford parts with Ford part numbers. But I wonder how readily available they will remain as the rig gets up in years.