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So I've ended up with a 1961 Harmony H54 for free. The neck has about .022" of relief without strings on it. The fretboard was taken off long ago. I got it like that, it was just stuck on with double sided tape. I have no clue why it was taken off other than maybe someone wanted to fix the excessive relief and changed their mind. It looks like the original steel reinforcement rod was never actually glued in. It seems like it was bent and only meant to hold in with the pressure of the bend.

I'm not sure what to do next with it. I think that properly gluing in a reinforcement rod and gluing the fretboard back on would maybe be sufficient to put the neck straight but since the fretboard is already off and it's a bolt-on neck I'm kind of thinking about putting a truss rod in it. The only things left original on the guitar are the tuners and the tailpiece so at this point I'm not too worried about originality. It would have to be a heel adjustable truss rod since I don't really want to get rid of the cool "Steel reinforced neck" script thing on the headstock.

Would I be shooting myself in the foot with that idea? I feel like it would make the guitar a bit more playable but maybe there's something I haven't thought of and it's a completely stupid idea. I don't deal with vintage guitars often, I have the tooling and ability but I lack the encyclopedic knowledge that people who do this regularly all seem to have.