If i was you in your situation this is what i would do. I would buy a good rolling chassis with a bad tub. Around a 1972 yr model. Then i would buy this tub , get it blasted / painted and put it together on your time.
https://forum.ih8mud.com/sale-parts...tub-excellent-clean-straight-solid-uncut.html
https://forum.ih8mud.com/sale-parts...tub-excellent-clean-straight-solid-uncut.html