Crager SS sizes

Priceing out things to make my rallyes look pretty with new trim rings and center caps comeing to $500 bucks all the way around... Or I can have 4 new cragers with lug nuts chrome val ve stems and center caps for $1024.

If I decide on the cragers is anyone running them on an unmodified Duster and in what size? I figured 15x6 for the front and 15x7 for the rear... Or can you fit an 8"