220 volts is fine, but all the shops i have worked in we never used a 220 welder its always 120 volt, plug it in and go, i wont get into welding lol
on regular uni-bodies, like the n-body/j-body/ w-body all those for example, even a 2008 model by gm does not use high strentgh steel, why?? i dont really know, now all those cars can have heat applied to a fame rail to repair, and or replace
cars like subaru/bmw/mercedes/lexus/jaguar/ subaru is the only car that does not use high strentgh steel on the out side of the car, the other cars use it inside and outside the car, the last mercedes i did i still cant believe how strong that steel really is, i fought with that car on the frame rack for a week!!!!
also the c/k trucks, the trail blazers, tahoes, all have hydroformed frames, that is another material we do nnot weld to, put heat too, if the frame is kinked real bad frame is to be replced, which then totals out the car
your gettin there my young apprentice
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