no idea and no idea!! its not mine, its just at the race shop
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theres a link in my "changing my exhaust" thread!
http://www.ls1truck.com/forums/mecha...y-exhaust.html
I've got a little Lincoln MIG welder, model 100, 110v system I use and it can do some serious welding for only a 110v unit. If you have a 20 amp plug and a good extension cord you can weld 1/2" plate though they only recommend 5/16".