73+ disc brake backspacing

Thanks for all the replies I went with 15x6 4.5 back spacing I read that the 73 big bolt pattern disc brake set will add almost 3/4 of an inch on both sides so I went a half inch more to 4.5 back spacing came out nice!

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Well done...and damn, those cop wheels/hub caps look great on there. Any additional pictures would be welcome.