Yes long bed & that would most def be the easiest way but I have shortened the inside box space to short bed measurements to accommodate a blow thru sub enclosure that was pretty tricky & expensive to fab up.Your truck is a long bed right? I'd think the easiest thing to do is get a dually bed swapped on, then figure out your wheel width and backspace to fill the gap.
This link will help. At the bottom is a pdf for how to measure and what all the terminology is about.Yeah I was thinking really deep wheels & was gonna try to use replacement fenders from same year.
I was thinking bout narrowing said fenders just a lil if need be.
Hoosier has some too but they are cubic dollars too! Please choose radial tires. The bias ply tires need tubes.Ken to the rescue lol. You'll want to go a 15x14 or 15x16 wheel but they get stupid expensive as do the tires for that width as you are stuck with a Sportsman Pro or S/R tire for streetability.