Just a "buyer beware" to OP. The last time I checkled with Wilwood, which was about 10 years ago, the Wilwood hubs might not fit your knuckles if you currently have OE disc brakes. I don't know if it is true for '73s and newer, but for 67-72s, Wilwood only made hubs to fit the OE drum brake knuckles. Apparently, there were not enough potential customers who wanted to change out their OE disc brakes.