What he said^
Very common to RV makers to use the prior year chassis, especially since some of them change model years before the auto makers do.
Ford did not make any mid-year changes. If you see the old grill, its actually a 2007 chassis. The new grill also corresponded with some major chassis suspension changes. You can read about them here:
https://www.fleet.ford.com/truckbbas/non-html/2008/whatsnew2008.pdfThe changes were all big improvements. I swapped my entire front end for a new take-out assembly from a 2009 van that was converted to 4x4.
