This is a heads up for anyone purchasing a Wilwood brake kit in particular the 140-8921 needing front bolts to install the caliper brackets. The kit requires you to reuse the factory caliper bracket mounting bolts. These bolts do not come with the kit or the new C6 knuckles. They are M14x2 bolts 47mm long. My local hardware stores did not carry these bolts but I could order them in from McMaster Carr. It was fastest to order from the dealer.
The GM part number is
Bolt 14084051 4 qty needed $8.34 list price each
Washer 10268875 4 qty needed $5.36 list price each
I hope this saves someone the headache of finding parts like this.