Tire expansion under throttle?

You probably know already since you are asking but the average radial tire will grow less than a bias or race type tire. If you just want some big radials you should check these out, they are not an exact match to the size you have on the car now but they have a couple that are close.
https://www.hoosiertire.com/images/content/files/pro street for web 1 20c.pdf