Save the aggravation and have it done somewhere else.
I had some made, they made the backspacing 1" less than what I asked for, even had what I requested on the receipt. Would not make it right. Also took about 6 months, they said it would be only 1 month. Otherwise a good job.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-