All I have is the remains (50%) of the TANK Sheet- Chassis Broadcast Copy found on top of my gas tank.
Tire detail below
Mark the tires on your car look good. I just switched to some Firestone radials after 20 years of Bias ply redlines and the car is Fun to drive (Safer)!
I put the GYR-WT-GT in as a spare because, It looks great.
I have no vintage pics of MY car and have no information as to what was installed from the factory. If I recall others have indicated that the "Z" wall code was for a White letter tire, just what brand would depends on a lot of factors?
A lot of the advertising for PACE cars shows the GoodYear Wide Tread GT. I realize that all production cars would not be the same.
Hey didn't Steve from the east coast have some great vintage pics of a pace car he has? Maybe a tire shot.

Jim