73 or 74? I had been flying all night the day before and then to Amarillo for NHRA World Finals -John Stewart driver, Bill Schultz----Amarillo was 4000 altitude I think-we had run good there because I used a lower gear for more revs-car was nosing over towards top end so wanted to go more on jet size and earlier with high speed lean out valve-it was installed downwards in the Hilburn pump-I took it off (not normal) because I had to change jet and shims,etc------tired as all hell-put it back in upside down so it never opened at all and car nosed over about 800 feet instead of 1000-1200

Lessons learned---call in sick for flights before race days not just the ones on race days