I’m a sucker for lost causes, drop it in sometime if you are passing. I mostly do repairs rather than new building so I will be happy to give you my opinion. I’ve never found an instrument that wasn’t worth saving. I will leave finishing to you after any repairs as touching up finish is the hardest part.

I would be interested if you have one with a back bow.

@rocknroller912 I have an old acoustic knocking around somewhere with no truss rod, it does not play well. Lots of string buzz, it may have a back bow, I’ll have a look if I can find it. I’m willing to share it with you if you want to take it. It’s a bit beaten up so I could give it a new finish maybe. I’ll be north of the border soon anyway, so it will make life easier for some of us wanting to get together at some point. 👍

People have had some strange ideas on building in the past. Thank goodness for modern technology. I would be interested if you have one with a back bow.

They had a jig for gluing up with a curve.

@rocknroller912 How interesting. Thanks for all of this info and input. 👍

Another thought. When I first started making in the 1980s I used to buy from a firm in Pennsylvania US who built a back bow in on purpose to counter string pressure. They had a jig for gluing up with a curve. It confused me for a long time until I started to understand more about guitars.

https://www.buckscountyfolkmusic.com

I had a good think about this and waited to see if there were any good ideas from others, so here’s my input. 
A guitar with back bow on the neck and no truss rod is likely to have been made a long time ago so it may have been put together with water based hot hide glue, which isn’t that hard to take apart. I would take the fretboard off and see where the neck is. It might have been glued with a deliberate back bow which just was badly done and might spring back to a better position. There might also be room to plane the neck and glue the fretboard on flat.

find some tight pants/shorts to put on...

@bpower I dare not show you. This is a family forum. 😆