Since the OT is the source material of Star Wars, I’m assuming you mean a complete Star Wars reboot, and not something in the same vein as prequel rewrites where I’d have to keep them in line with some existing material.
I’ve always liked the idea of a 1800s or pre-WWI 1900s Star Wars with some anachronism. It’s set on one planet, with boats instead of spaceships, real sabers instead of light sabers, Vader is a full-on samurai. Technology and culture haven’t evolved in the same way on this planet as our own, so naval warfare technology is advanced, with WWII-era planes (to keep that dogfighting babey), but other areas of technology are lagging. The Death Star would be the first nuclear weapon this world has seen.
I meant trying to fall in line with the existing material, but this is good too. Really interesting idea, and I think this was already done with Steam Wars, which is a sort of steampunk parody of Star Wars that falls in line of what you have in mind (it’s actually pretty interesting, so I’d say read it if you can).