[MDPotter]

Do you have access to a mig welder? I don't know what your manifolds and downpipes look like, but parts stores have bends, clamps, mufflers, and hangers and you might be able to piece something together with minimal welding as a temporary setup. Or you might be better off to take it to a shop for a cheap setup that doesn't have to run the full length of the truck. Having the mufflers under the cab will give you more noise and fumes, but if it's temporary it's not a big deal. I ran my truck like that for a few months and it was fine, but I didn't drive it very often. Turbo mufflers on an LS engine without cats aren't that loud and they're cheap.