Steve,
NapaOnline.com lists that rotor as being used in all 4 wheel positions but doesn't say what on.
I put in 1991 Dodge D350 1-ton pickup and it shows the 85604 rotor so that's one of the applications.
As my mockup sits right now, the rotor is not yet piloted to the hub. It looks easy to make up a ring to pilot the ID of the brake rotor to the hub but then I haven't talked to the machine shop yet.
The hubs are GMC/Chevy, '53 - '59, 3/4 & 1 ton w/duals.
John
