There could be a lot of ET left on the table from your current combo.
Example, if you can't leave hard, of the line, because of tire slip, and your using street tires, well, then a set of rims and slick that you bolt on at the track could make a big difference in 60" foot as well as ET!
They say for ever 100 pound you take of your car is a better ET of .10 There is many hundreds of pound that can be remove from a stock car, with 0 dollars spent.
What does you car run now, what is the present combo?
aka motor transmission rear axle, gear ratio.
60" foot times as well as ET.