I have welded a few frames and gusset kits. It is important to use the correct wire size a voltage on your mig welder. What size welding machine will you be using? I use a miller 250 with.030 solid wire. I believe I was at around 17 volts(cant remember wire speed). I also used my TIG machine to fix some cracks and replace motor mounts. TIG looks better, but is slower and not worth it lol. I do not pre-heat or control the cool down. Good luck, Loren