JEFF - Yes, IH made two slant 4's, a 152 CID, right bank of the 304 V8, and a 192 CID, right bank of the 392. Sorry, no 172 CID slant 4, right half of the 345.
The managers & supervisors at IH mfg plants could lease Scouts really cheap, about half of what payments on a new Bronco or Blazer would have been at the time. So just about everybody on management drove a new or newer Scout to work. IH wanted the plant's parking lot full of IH too. The managers could get a new Scout every year, and after a while, they all tended to get them one way, LOADED with every option and the 345 V8. There really wasn't much of a difference in miles per gallon between the 304 & 345, they both got 2-4 MPG less than the comparable Bronco w/351 or Blazer w/350. As your co-worker's Scout shows, the interiors on Scouts were rather... GAUDY, and some of the details were rather rough compared to the competition, but one thing Scouts had going for them, they'd run 100,000 miles easily, IF you could put those miles on fast enough before the body rusted off.