If you will want to haul other stuff the welder will be in the way that's for sure.
But if you just want an old truck to drive around in and take to shows then having the welder, tanks, and torch and any other tools and nifty things all spiffed up and in useable condition will set your truck apart from everything else at the show.
Having been to a lot of truck shows I seem to be drawn to, and enjoy looking at, working trucks and otherwise trucks outfitted for a particular specialty or purpose. They're more fun than just another example of a plain old whatever it is truck like the rest.
