What truck is this brake swap good for?
The late model brakes, and more importantly, the rotor comes from a single wheel pickup. Note that the rotor slips over top of the hub then the wheel is installed.
The brakes as they came on the late model axle will not fit in a 19.5" dual wheel. PICTURE
However, by locating the rotor behind the 14 bolt hub which has a thickness of 1.520" (measured) you gain that much more room.
Here is a picture of this rotor and caliper sititng behind a 14 bolt hub all inside a 19.5" wheel. There is plenty of room. PICTURE
The same in an original 18" dual wheel also fits quite well, no trouble. PICTURE
This swap will also work with a single wheel AD pickup (and many others). Although likely a small wheel won't fit over the 13" rotor and caliper. I have not tested but don't foresee any issues with 19.5", 17", or even 16" single wheels.
Judging by the fit as shown above in a 19.5" wheel which leaves the caliper somewhat below the outer surface of the tire and how that tire/wheel fits the original truck with about 1" clearance between the springs... Indicates there should be plenty of room between the caliper and the leaf spring while keeping the original ~63" WMS.
Should be a good swap for single and dual
wheel AD 1 ton trucks (and others) when also doing a 14 bolt axle swap.