[Superfan1]

Announced by the NHRA on March 27:

FS/AC: Minimum weight up to 400 CID 3250Lbs, 401 to 450 CID 3350Lbs, index 10.50

FS/DC: Minimum weight 451 + CID 3200Lbs, all supercharged 3500Lbs, index 10.20

According to the NHRA Classification Guide, David's car has a factor of 7.11 which makes it a "natural" BB car, minimum weight 3200 lbs, on a 10.30 index. That means he was 150 lbs heavy, but he was running on a 10.50 index instead of the 10.30 BB index. No matter how you look at it; that car is scary fast!