4 Goodyear Polyglas F70-15 Widetreads D.O.T.

[69L78]

I just talked with Kelsey Tire and they told me they were originally used on B body cars the first half of 69, on GM mid size cars like the 71 Chevelle SS, and for a warranty replacement for the 68-72 Corvette because they were more readily available, and also he did suspect that they were used for a replacement warranty on the Z/28, because they were more readily available than the E70-15. I am no expert, so here is the phone # for Kelsey Tire. 800-325-0091

[agtw31]

my brother's '69 w-31 had white letter goodyears when new,but were F70-14's,not 15's.

[mrrec]

I've had good luck with Kelsey, but I wouldn't use them as my application guide......
Dave