This is me in the late 70's with said Firestone tires on my 67 H.O. four speed GTO. Next best tire I ran were the solid white letter tires "Formula 1 Super Stock" they had a herringbone tread pattern, they had much better "bite/grip" than ole Firestone's. Most of the successful dirt track racers ran the Formula 1's around here. I use to run the rears with single digit pressure for the widest footprint I could obtain. I was never a good street racer, babied the car all the time, never speed shifted it, always shifted < 5,000 but my car served me well for over 40 years while all my friends were beat to death and graveyard dead.
Tim john---
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