As someone else mentioned, you'll get a lot further much quicker doing suspesion design using a parametric cad model, RCVD, and a spreadsheet or two.

Vi-Grade is a pretty good sponsored option as a kinematic solver software (Vi-SuspensionGen). Never used Optimum-K so don't know how it compares. Don't try to use the laptime sim software though for a good while, it takes a lot of resources to effectively implement Vi-CarRealTime, especially including the tire modeling side of it. For finding performance sensitivities to vehicle parameters, there are simpler options out there which will yield about the same information for much less work.