Overdrive or don't worry about it? !
Tell me about your t/a tires. I just bought a set
They are my favorite Classic Car tires, drive and ride nice. The right sidewall height for the "Classic Car" back in the day look.
I turn the white lettering in to the inside. Like the lines of all classic cars without having to read the tires or advertise for tire companies.
The set I have posted above had the special 65 series for the fronts, not too tall and not too short. This combo gave a 1" rake from the back of the car to the front in tire size. On 7 x 15s on the front and 8 x 15s on the rear of that b body. The car had the Monroe Style air shocks on it that were 30 years old still holding air, so it was nice to dial in the ride height of the car without being too stiff. Cranked the front torsions up a couple turns to help get the car back up to stock riding height after 40 years, reset the toe in after so it would not scrub the new tires after the height adjustment.
Was a manual steering car too, so that helped with the performance a bit too not having to run a power steering pump, clutch fan too, that also helps too.