"I was thinking about ordering this kit. This car will never see a race track. its just something my wife and I take out on an evening cruise"
The advantage disc have over the drums is in dissipating the heat generated by repeated, hard, or constant use; such as racing, hauling a trailer, or driving in mountainous areas. If you are only out on evening cruises, disc are no better than drums.
Keeping the drums (in proper condition) simplifies your restoration and eliminates potential problems with wheels and other things (for example, proportioning valves are needed for the disc and serve no purpose on drums).
'Newer' brakes are superior but it's because of the computer controls, the LARGE rotors, and the traction from today's tires.
Not being critical. Just offering some suggestions for your consideration.
Good luck with you new toy!