what changes are discussing? there's so many different things you could be talking about?
are you talking about running a mustang II setup up front? Are you talking about backhalfing a truck? Are you talking about doing a complete frame build? Are you talking about an IRS.
with the mustang II setup, a lot of guys run it because it's gets limited camber change. More importantly though, it's very versatile and has a ton of aftermarket parts such as huge bear brakes.
Most guys with Rangers with beams up front want to switch over to either a toyota front or Mustang II to get rid of the beams, they're a bitch to work with and are hard to get to lay on big wheels, etc.