This is the bracket for your Chevy D70 Dually and it actually fits. I developed these after the success of our 14 Bolt brackets and seeing what was available on the market and the problems associated with the others. The D70 was used by all of the Big 3 automakers and they all had different uses and designs specifically for them. These are for a Chevy D70 Dually only. These are for Dual Rear Wheel (DRW) axles not Single Rear Wheel (SRW) axles. Both the Dodge and Ford have different flanges and tube diameters. We have actually identified 4 different flanges in use and 3 tube diameters. How can 1 size fit all? So Please, don't buy the 1 size fits all available out there, you may get lucky and have it work but the odds are against you.....These also use the '75 Chevy 3/4 Ton Front Rotors and Calipers. They will need the rotor throat opened ~3/16"
These are not for Dual Rear Wheels, they are made for people running that axle with single rear wheels.
NAPA Part numbers for '73-'87 3/4 Ton Front, 4x4, Chevy Calipers and Rotors:
Caliper ONLY: LH - N4674, RH - N4673 - Both of these are LATER year part numbers
LH - N4597, RH - N4596 - Both of these are EARLIER year part numbers
Rotor Only - 4885677 - all years