That's the idea, and I'm pretty sure he's going to brace the lower/bottom portion of the frame, as well as both sides, before welding-in a sheetmetal "cover plate", if you will, to make it look as OEM as possible.
Thankfully the vehicle isn't driven much (3-4 car shows, the occasional Sunday drive, etc), and the LH/passenger side "frame" sounds pretty solid, so I'm pretty sure this will be the last time repairs will be needed for quite some time.
