trigger GTA

so i have finished my brake upgrade. 2017 camaro brembo caliper's and 13.6 inch vette rotors. now for the next step of picking rims that will fit. i know already that 18 inch rims are required.
I see alot of people using vette rims and spacers.

i do NOT want to run spacers and i would like to run as much dish in the rim as i can. I want to have the caliper close to the face of the rim. How do I go about figuring out the dimensions needed.