A quick googling shows the CVPI track width being around 63 inches. Don't know about the squarebody rangers, but 93+ Rangers have a track of 58.5 inches in the front. If anything, the squarebody trucks may be a bit narrower than that, so the CVPI swap would probably be 5-6 inches wider than your current front suspension.
If you want to ditch the ibeams, and switch to control arms, you can try 98+ Ranger 2wd clips, 90's toyota truck clips, or Mustang II clips. The bagged guys do clip swaps quite a bit, and those are the 3 most common donors.
Or, AJE just started selling a bolt-on kit to use a foxbody mustang k-member setup in i-beam Rangers. I don't see it listed on their website yet, but I've seen it on their facebook page. Looks nice, and supposedly takes a couple hundred pounds out of the front end. Also allows you to easily use anything (suspension/brakes/coilovers/bearings/rack and pinion steering/etc) from the massive Mustang aftermarket. Here's their website with contact info:
http://www.ajeracing.com/