So, got my engine in the car and took it to the track today for its first shake down runs. It's slow and I really don't know why.

The engine made 460HP on the engine dyno. The car is 3667 with me in it. Today, it ran a best of 12.99. Plugging that into Wallace Racing Calculators, that's 330hp to the crank, so; it's running like it's down 130hp.
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With milder iterations of this engine, I've run as fast as 12.25 and have never run as slow as I did today, with lesser power.

The car isn't doing anything noticeably bad or wrong though. It's not missing, it's not laying over, it's not making noises, It's launching okay, not as good as it has in the past but, maybe off by .10 in the 60ft. The fuel pressure is right below 6lbs (Edelbrock Thunder 800), the air fuel ratio might be a touch lean for max power (low 13's). I checked the throttle, and the carb barrels are opening all the way when I have the pedal pushed all the way to the floor. I'm just kind of like, why did it slow down that much?

Again, if it was doing something noticeable, okay but, it's just not really doing anything bad, it's just slow.

My first thought, take it to the chassis dyno, like 20 minutes from me, see what it's putting down to the tires, monitor fuel pressure to see if it might be dropping at any point, and see if we can find any smoking guns. One would assume that it's an issue with something other than the engine itself, since it was made the power it did on the engine dyno.

What else should I be looking for? Just never had an issue like this.