2 blue rims are stock steel from 99-up stupid duty ford. metric pattern 8x170
and the truck looks like a flatbed stake side unit set on a old first gen 2 ton army 6x6 made by gmc . not the style we like with 2.5 ton top load axles.
the old gmc units were front load axles and older. weaker and getting hard to find some parts for.
and grill emblem on grill gaurd shows gmc. the front bumper should have 3 holes in the face per side. but its been cut down or swaped out. thats the other way to tell if older gmc at quick fast look.