I run 1.12's because I have the Hotchkis setup on my car to keep everything balanced and close with their 1.10 torsion bar recommendation. Mopar Mitch swears by 1.24's and I don't doubt him one bit. I thought about 1.24's as well but the 1.12's have performed flawlessly around the Carousel at Sonoma and the Corkscrew at Laguna Seca so no need to change them out, which keep costs down. This is on 315's at the front with no bottoming out or any major issues.

With your 245 fronts you will have understeer, so keep that in mind with your TB choice as it should match the rates for your leafs.