Z/28 Goodyear Wide Tread vs Firestone Wide Oval

[NorCam]

I need to order correct rubber for my stock YH Rally wheels and while I know the factory used E70/15 Goodyear Wide Treads I am told they have a really poor ride. I was also told the factory also used Firestone SC 200's (early) and Firestone Wide Ovals as well (what time period if applicable). Myself, I like the look of the Bias Ply Firestone Wide Ovals or Goodyear Polyglas over that of the Goodyear wide treads and I am wondering if the Firestones are a better ride being that they are a polyglas tire? If applicable. which MFG is correct for a May 69 car from factory or did they use both throughout the year?

Thanks in advance.