Ken...
The 69's only used Bias ply and either came with Goodyear Wide Tread GT's, or the Firestone Sports Car 200's on some late year builds. Not fun driving on either of them for most people, and that is why so many owners change them out. Many who want to retain that vintage look end up mounting Polyglas belted bias ply tires, or the Firestone Wide Ovals which are also belted. Coker just started making a
radial version of the Wide Ovals but they don't have that typical squared off look that the bias ply tires have. They are more rounded and kinda look like many of the modern radials? Click here for a
Yenko thread with those who have swapped them onto their cars. I still don't think they are offering the 60's series quite yet and have watched their release dates push back continually through 2017.
Maybe keep the originals off to the side and mount something more modern if you want a good handling tire for highway cruising, or stick it out with with either of the bias ply series? I am not a fan of the tread patterns or handling on either of the (2) correct tires and with so many people going Polyglass on their Camaro's, I decided to mount up the Belted Firestone Wide Ovals which are actually correct for 70 Z/28's. I just mounted the wheels back on the car an hour ago and still need to go and dig out the trim rings & derby caps. I'm hoping these drive well when I get this back on the road.