Im looking into getting another 91-98 k1500 but right now all the ones that are ext cab in my area are junk. there are some decent 3500/2500 crew cabs and some real nice standard cabs. my question is if anyone knows how hard it would be to put an ext cab body (cab& bed) on the standard cab chassis before i dive into it. and maybe a crew cab for that matter. as i know gm use a similar frame for years what range of years will be the same if not very similar. thank you all for your help.