these are 1.6 " wider whitewalls on my 78 salon which were part of the salon package.
chrysler listed them as www for wider whitewall. you could order them on other 78 c bodies.
and i have them on my 77 cordoba t-top ( mounted on 80s cordoba aluminum wheels)
I am generally in favor of OEM-like choices, and thus narrower WW, but I must say that @71Polara383 's "Minnesota" makes a really strong case for the wider WW.
I Like the 1.5 Whitewalls. NOT from Suretrac (China) or Hankook (Korea).So that Limits the choices. I just can't put Asian tires on a Heavy car. Quality control issues. Just sayin'