On a recent trip to Quigley (Oct.) we noted that they were now using 17" wheels to accomodate the 14" rotors on the F350 axles used in the newer conversions. Not sure if all the sizes are available for 17" rims compared to 16".
2008 Ford E-350 Quigley 4x4 V10 - 164,000 miles
RB50, PH Top, Dual AGM Group 27 Deka, 2000 Tripplite Inv., No Propane or Water Systems
Van Weight 8,100 pounds, added one rear leaf spring, BFG AT KO LT265/70R17 E Tire press 50psi.