wheel and tire combo

[davecarney2]

This is what I am trying to go for. Anyone know what this wheel and tire combo would be. guessing 15x8 or 15x10 in the rear. havent had a lot of luck finding wide white wall tires that are also wide enough for a 15x10. I have been looking at Diamond Back tires to get a 275/60 15 for the rear. Would like to go a little wider but not having luck without going to a 285/70 Coker. Not wanting a tire that tall. Going full Porterbuilt so a 28 or 29 inch rear tire is the goal.