Wilwood front kits 69 Barracuda

Anyone have any experience with Wilwood’s front disk brake kit for cars with factory front disk? Recently? I read conflicting info that the hubs support both 5x4.00 AND 5x4.50 bolt circle. Guy at Wilwood told me it supports 5x4.5 and 5x4.75. NO 5x4.00. I want to stay with SBC so I don’t have to change rears and all 4 rims. Anyone? I’m looking at kit part number 140-15459-D. Thanks!