The Pin-drive and bolt-on wheel specs are
here but my recollection is that the Daytons are only available in 7" and 8" in the appropriate offsets. I've got the specs at work - I'll post them tomorrow (Tuesday).
The Dayton wheels are very stout (designed for 4000 lb cars) and I wouldn't worry about their strength.
Wire wheel page added today.
Dayton Wheels