VIPER CALIPER BRACKETS

BergmanAutoCraft said

The key parts needed are Mercedes rotors which range from $25 and up from rock auto. The center bores are very close to the mopar bore but they need to be opened up to 2.780”.
You will also need a hub. This is 73-76 disc rotor with the brake surface machined off. Rotors to make the hubs are cheap too as everyone knows. I can provide the hubs and rotors if someone wants, but these are pretty easy items for any local machinist to do.

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I know Andy changed the offset on his hubs at one point, to better use the Mustang wheels. My guess was that this kit was built with those hubs and the rotor would be in the wrong position if the cut down rotor was used.

I am familiar with the hubs you are talking about, I built a set of those hubs for my PBR swap and am running them now. I didn’t think they would work.

Edit - to be clear I am only stating my assumptions, not arguing with you.