Question for Super Stock Thermoquad racers

Thanks everyone for your response to this question, to give more insight in to what is going on. Back in the 90's I was running an 80 Mirada with a W2 372 in. with 11.6 comp. and 590 MP solid cam, I started out with a TQ from a 73 440 side feed, and for a short time I had a 1000 cfm Comp TQ center feed. The car at the time hit a brick wall in the low 11's, just would not feed it enough fuel to go any quicker. I bolted an 830 Holley on it with no other changes to the fuel system and the car dropped in to the 10.8's. A few months ago I had a discussion with a friend who managed to get his car in to the 10.8's before he ran into the same problem, his car runs in the Fast class and he can't do any mods that do not look stock. Last night I got thinking about this and thought what are the guys running Super Stock doing, because they generally run quit a bit quicker than low 11's high 10's. Thinking about this a little more I realized that(I think, not sure) Super Stock can mod there carburetors as needed as long as it is the right part# for the year car and engine.