Welding, Extension Cords, Generator Power and a Fox Body Mustang. What could go wrong?

We've got to weld the frame of a Fox body Mustang in a shop that's being built and doesn't yet have power. The shop is running on a generator and extension cords. Can we weld, or better yet should we weld on extension cords? Only one way to find out sometimes, you just gotta do it! At least I have a pro welder running the beads! That's one thing we know we've got going in our favor.

We brought our new Arccaptain MIG 130 to this job, and we are hoping it can not only run on the extension cords, but also brings the power to weld the frame sections to strengthen the rusted out frame. I'm told by the Mustang owner this is a pretty common repair on these older bodies.

Links:
Arccaptain Welder: https://www.arccaptain.com/products/no-gas-mig-welder-mig130-entry-level-welding-machine/?ref=roostersgarage or https://www.amazon.com/ARCCAPTAIN-Welding-Inverter-Portable-Equipment/dp/B0B1TGB5NW.

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