1960 Apache wheel selection HELP

[shane Stanley]

I recently purchased a 1960 Apache fleetside. I purchased a McMgaughy's 2" drop spindle disk brake conversation kit for the front end. I would really like to keep a stock looking wheel but I am unsure what will work with this particular front end. I don't quite understand the whole back spacing measurements but I am assuming the stock wheels I currently have wont clear the new brake calipers. Any suggestions?

I also purchased 235 75 15 Coker whitewalls. Did I get the cart before the horse. Please help!