I have to weld some reinforcement on a back frame that's rusting out. I don't want to smoke the electronics on my 2.6mpfi in the process with my arc welder. Any tips on isolating the electrical system so I still have a working vehicle when I'm done or is it a non-issue if I keep the ground close to the site of the welding?

'89 P'up, 2.6 I-Tec, 488,000 miles and done... gone to the great beyond