The F-SuperDutys use 8x170mm bolt patterns while the vans use 8x6.5" bolt pattern. The earlier F-Series used 8x6.5" pattern. I think the change took place in 98.
I have F-SuperDuty wheels on my 04 van. They fit because the front axle is from an 05 F-350 and the rears have custom machined adaptors to make the fit.
SOLD04 EB350 Custom Floorplan
6.0 PSD 4.10 Posi
Salem Kroger coil spring 4wd
SMB Trailer w/AT Air Suspension
Alaska to Key West, Labrador and more
130685 miles 16.65 mpg average
Prostate cancer survivor. viewtopic.php?f=8&t=11099
2015 VW GTI
Leaving CA for WA