Dan Im sorry, but I have say that you were most likely not a very good welder back in high school, or your design was poor. I only say this because 80% of my truck has been built on 110V MIG welder. Most of the steel on a Toy like yours and mine are no thicker than 1/8" which is what those welders are rated for. If you've been welding for 8 years, Im certain that you would have welds good enough to work they way you need them to.
Im not baggin on you, Im just saying your are a better welder now than you were then, and the machines of today are better than they used tobe. In fact my entire front 3 link is done with a 110V.
Minit Truck frames and axles are all 1/8" thick.