Blasphemy no,Sacrilege,yes. :laugh:

I will be trying out a set of the same tires for my Z.
I have three sets of wheels now; and only two sets of tires.

Yes. But they have a funky tread design.

https://www.kelseytire.com/performan...lyglas-radial/

I installed a set of FR/70x14 wide oval radials on my SS454 Chevelle earlier this year.

I spent 15 years working in the tire industry. The wide oval radials appear to be a poorly made cheap tire that they are charging a premium for because of the look. I will say... they do ride nice and look cool. I probably would not buy another set. My SD455 was due for a new set of tires. A couple months ago I bought a set of 245/60R15 Mastercraft Avengers for $108/ea from Walmart. In all honesty... the Mastercrafts are a better quality tire overall... but don't have the "look". I used to be a BFG T/A guy. But BFG quality has gone down and the prices have gone through the roof.

Steve , they look very nice are those the same size as originally came on the car 27” tall seems like with a 3.73 or 4.10 she will be singing …

They look great, Steve. I hope they serve you well.

Tires look great and so does the stance!!

I may keep them for another concours show car. I saw Bill a few weeks ago and mentioned he has a survey scheduled for your project.

----Got a set on my 69 Grand Prix. Love them on that car as the ride is right for a semi luxury/muscle car!.....Bill S

The correct Z tire is an E-70-15 wide tread and Kelsey lists that tire at 26.73 overall diameter.

Their F-70-15 is listed as 26.51 overall diameter.

Pretty close in diameter.

The Firestone however varies a little more and in the other direction.
E-70 Sport Car tire is listed as 26.6" diameter but their F-70 Wide ovals are listed as 26.9" diameter.

When jumping to the radial design from Coker, only offered in the F-70, the diameter jumps to 27.1 inches so they are taller than all of them.

I just texted my buddy - he's on his second set of these tires. Over 38k miles on two sets in his 1971 Corvette that he drives everywhere. Most recently drove from NY to FL in all weather and temperature - no problems to report. This is a great case study on these tires. We put them on a buddy's '70 LS6 Chevelle too. He's loves them as well.