finally ran the car at the track

Just something to consider: There is the possibility that the car has more MPH capability. What I mean is, if the 13.0 is a good e.t. for 102 mph, you can be fooled into thinking all's well. If there's a fuel delivery problem or valve float, etc., maybe it should have gone 105 mph, if all was well. Are you a new racer? Sometimes, a new driver will take his foot off at the wrong spot on the top end. Giving a low, false mph. Now, the e.t. isn't low enough.
A street car's e.t. won't be as low as it could be for a given mph, because the car isn't set-up as such. I'm thinking you might be losing something, somewhere. Leaving at 2000, spinning or babying the gas won't produce the lowest e.t. for a given mph.
I hope I r clear!