ok that is odd
on my d70 the d60f rotors required me to turn the hubs down but the 3/4 ton chev rotors from a 77 fit without the machining
I only cut one hub before going the easy cheap route using the less cool chev calipers so I had one cut and one untouched when I did my swap
my d70 was out of a 90/91 Dodge CTD
I had weld on brackets custom laser-cut to convert to disc
on my d70 the d60f rotors required me to turn the hubs down but the 3/4 ton chev rotors from a 77 fit without the machining
I only cut one hub before going the easy cheap route using the less cool chev calipers so I had one cut and one untouched when I did my swap
my d70 was out of a 90/91 Dodge CTD
I had weld on brackets custom laser-cut to convert to disc