wheel spacing help !!!!

[dkauffman05]

Starting on a new build. 69 pro-touring. My head hurts from trying to decide on wheel back spacing. I'm going to be running 18x9.5 in rear and 18x8 in front , id really like to run 18x9.5 on the front also if anyone thinks I can help me out . Id it helps the front suspension will be ride tech complete a-arms with coil-overs with most likely cpp modular spindles. I want as much lip on the wheel as I can get. I don't like when a wheel and tire sets in too far .