http://www.stovebolt.com/gallery/godwin_rodney_1949.html
http://www.stovebolt.com/gallery/maher_shawn_1946.html
Check out these two trucks. The 46 is a 1 1/2 ton on a new gmc frame with 10 lug wheels and the 49 is a 1 ton where the fenders were cut to allow a drop spindle to be installed to give a better stance. I like both I have tried to contact them but have not been able to get a response. I think both listed emails sent back the mail message.
http://community.webshots.com/slideshow/568633139UrmOzO?mediaPosition=1 this is a slide show indicating the wheel spacing from above the front fender. Looks like some where between 1 and 1 1/2" to 1 3/4" depending on where you are measureing to. Hope this helps.