[Zeke]

And, by code, it all has to be in a common conduit to be a unified circuit. If you have 2 conduits running out there now, no dice. Unless you have a big enough conduit to pull new wires.

How many feet are we talking about? I don't have 230v to my garage but when I want to weld, I run a beefy ext cord out there. No difference than hard wired if the distance and gauge is correct for the draw. If you are running cars up and down the lift daily, that's one thing.