67 cuda tire whitewall trivia

I'm need to replace the tires on my 67 Cuda and I would like them to be as original as possible. I have 14" rims and I'm pretty sure the original tires had narrow whitewalls. I'm looking at Coker tires and they offer 5/8 and 7/8" wide whitewalls. Does anyone know which one is more correct? Yes I have too much time on my hands.

Are they 4.5 or 5.5" wide rims?
68'-69' Factory original performance 14" Firestone or Goodyear tire stripes are 3/8" wide.
I'm almost thinking '67 standard tire was 13" ?