Ricardo, first of all, you do you. Our opinion don't mean jack to your enjoyment.
For a nice original style swing axle car, I do think the advice of a camber compensator and sway bar is sage advice, though. Even a relaxed, cruising style driver will eventually have to take evasive action when some texting yutz wanders into their path. It's super cheap insurance you'll never notice otherwise.
The big thing that's changed since the 50's is that an old, round shouldered, bias ply 145/16 tire would break traction pretty early and allow the "Wischen" slide, tail happy cornering of the early 50's. Now, even an El Cheapo modern radial will supply more traction than a mid 60's race tire, overwhelm the system in evasive maneuvers, and then we're off to jacked axle city.
You know exactly what you want to do with your car, and that's good. Go with Greg's advice. He really knows what he's talking about and he's great to work with. He's building me a coupe and my plans is: IRS, tuning the suspension to the best it can be, sticky tires, Suby power, and an up to date will&testament. And that's me, and I bet we'd still have a great time sharing a beer.
Good luck with the project!
Michael