Re: F150, F250 interchangable parts
About the only shared parts are the engines & transmissions, some exhaust component, and some interior bits and pieces (switches, radio etc).
That said.... There seems to be an ample assortment of aftermarket stuff for the E-series. I went with a BuckStop bumper/grill guard, and Reunel rear bumper. Many folks on here have Aluminess.
Likewise, there are may aftermarket E-series shocks available, but they are a little harder to find sometimes. Bilsteins are popular. I run Les Schwab shocks because of their amazing warranty.
2000 E350 extended wagon dually
V10 w/ Banks Powerpack, Diablo Predator
Buckstop Outback bumper/grill guard
Reunel rear bumper