I'll throw some more fog into the question. F70x14 tires were an option on 302's and 351-2V's, however I have yet to run across a car so ordered (then again, I haven't run across that many Marti reports on those cars either. I wouldn't rule out their existence, though.
That said, I have documented at least two M code 'verts that came with the smaller tires. One was 0F03M145395, a December build car, that came with E78's and hubcaps (from the Marti report). The other one was a late production 351C-4V M Code 'vert that came with E70 tires and shallow sports covers (also from the Marti report).
Big difference between deep dish and shallow dish sports covers (only difference actually, as the centers are the same) is the depth of the covers. Place them on their backs on a table, the ones that stick up further are deep dish.
Find some with a minimum of dents on the outer rim, some light road rash is survivable. They can be ground, buffed, and polished to look like new. Dents on the dish portion can be flattened, but not when their on the rim (unless someone has come up with a way to unbend the outer shell, polish them, then re-install them since I researched it). You do need to grind the entire rim, as they were flash chromed from the factory, and unless you remove ALL of the flash chroming, it will show.
Carl