How big of a front anti roll bar / sway bar, to buy for a project.

[homegrown32]

I am building 1967 Camaro with a Chris Alston front sub frame, and TCI Fat tire 4-bar set up in the rear. I do not know how to pick the size of the front bar without being able to drive the car.
I have 275/40 -17 tires in the front and 335/35-17 in the rear. I have not selected the shocks and springs yet I am waiting to get the corner weights first. I have an aluminum ls motor in it. I do not want it to push in the corners, so I do not want to go to big.
Chris alston offers 3 that will fit the sub frame a ¾, 1, and 1 ¼. They say with the 1” bar they have “relatively short lever arms to achieve comparable performance to solid 1-1/8” to 1‑1/4” all of there bars have the same short arms. I will be running a NASCAR style rear bar 1 1/8 hollow bar with about 8” to 12” adjustable arms.

Sorry if this is confusing for a simple question