Hi jbow, that sounds like a neat project... and the furniture seems like a great idea too.
That old growth Southern Pine is beautiful wood, I'm imagining that there are no visible knots and that the grain is straight and clean.
I'd think the guitar could be beautiful with a transparent finish of some sort.
A mahogany neck could be nice combo too.
I don't think you can go wrong with assembling a fresh guitar to have fun with.
What ever you choose will give you hours of enjoyment.
I'd enjoy seeing some photos of the furniture when you get it.
best regards,
mike