With the wall open already, I'd just redo it honestly. Never gonna have a better shot at it, and 70 year old copper thats already crusty isn't getting any better. I'd go PEX for the supply runs. No torch, no fire risk near old framing, and crimp tool is like $50-80 and you'll reuse it forever. Sweating copper in tight spots between joists is a pain to learn on the fly.
Keep the last 6-12 inches in copper where it stubs out to fixtures tho, looks cleaner and gives you something solid. SharkBite or proper transition fitting should work. for the clawfoot, supplies through the floor looks way more right than flex out the wall imo. Your already in there so its actually easier now then later. Also swap the shutoff valves while your at it. Old ones seize up right when you need em.
With the wall open already, I'd just redo it honestly. Never gonna have a better shot at it, and 70 year old copper thats already crusty isn't getting any better. I'd go PEX for the supply runs. No torch, no fire risk near old framing, and crimp tool is like $50-80 and you'll reuse it forever. Sweating copper in tight spots between joists is a pain to learn on the fly.
Keep the last 6-12 inches in copper where it stubs out to fixtures tho, looks cleaner and gives you something solid. SharkBite or proper transition fitting should work. for the clawfoot, supplies through the floor looks way more right than flex out the wall imo. Your already in there so its actually easier now then later. Also swap the shutoff valves while your at it. Old ones seize up right when you need em.