Dang, that sucks Brad. Sorry to hear it's not quite working out.
When I checked with Aluminess they said the solution to a different bolt pattern like (8 x 170mm) or a larger backspacing would be to cut the lugs off and bolt an adapter plate to it.
The bolt pattern changes depending on the 4 wheel drive conversion. Older Quigley conversions were 8 on 6.5" bolt pattern which is the same as the new Sportsmobiles. Current Quigley conversions along with Northwest Quadvan and some others use the 8 on 170mm bolt pattern.
edit to add: I believe the Ford factory wheels have more backspacing (6.5"?). So you were going to need a spacer to take up that space anyway. There's some good info in this thread and also a nifty solution by Ford_6L_E350 viewtopic.php?f=3&t=2377&hilit=tire+spacer