Well it is just the same chassis as all the others with a big engine. It would cost an absolute fortune to develop an IRS systems for just the "sport" models and moving all of the utes to IRS would preclude the "tradie" utes carrying 1 tonne. It would also quite possibly prevent the trayback options making falcon, like holden, styleside only.

How this will be affected by the increase of Ranger sales is another story all together.

If Ford were to use Ranger for "tradie" and create a new IRS only ute for the XR6/T/GS that may also overcome the other "styling issue" of the separate tub would there enough of a market to make this viable?