Thanks Frank. As you know, you can order most wheels with backspacing in 1/8" increments, so every 1/8" becomes critical. I assumed the CA subframe was built with the stock track width as measured from their hub. Do you know how thick their hub is? I am using Wilwood,s hub and a Wilwood hat so maybe there is a little give (or take) in these measurements. If you add thickness to the face of the hub, you should be able to add the same amount to the backspace of the wheel,correct?
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