Gearing question

I am in St. Louis, MO. The car pulls pretty hard all the way down the track, I don't think it's leaning out. The plugs don't show a lean condition. I don't know what the car weighs, I would be guessing. It weighs what a stock dart does only with a big block. My cooling problems are on the street, not so much at the track. If I drive it for long periods or in 90+ degree heat are when the troubles start. I think everything becomes heat soaked, and it's alot of motor in a small area. I stayed up late working on my fishing boat last night and forgot to bring in my timeslip. I will do it tomorrow for sure.

Thanks,
GUP