Cragar S/S size reccomendation for '67 Camaro???

[Zedder]

I'm putting a set of Cragar S/S wheels on my '67 Z and wanted to hear from those who have found a good size to run without having to add air shocks etc. I'll be running 15's all around with radials and would like both wheel and tire size reccomendations please. Back in the day, 15 x 6 on the front and 15 x8's on the rear were the way to go, but they sometimes rubbed on the rear quarter panel and I don't want that! Any reccos??? Thanks, Mark