If your spindle looks like this, there is a good chance this bracket will allow you to use the Wilwood D52 two piston slider caliper on your stock rotor. Centric, StopTECH and R1 Concepts are both making slotted and coated rotors for a nice visual and actual performance upgrade.

The one I am unsure of is the D100 with the 5 on 4.5″ bolt circle. The inner bearing is smaller indicating the spindle may be different.

The update here is that the 1980-1984 Dodge D150 rotor for the 3300 lb. front axle is the small pattern rotor has the 63mm inner bore on the rotor so it does fit the spindles with the 1.49″ bearing register. Everything else is the same as the 3600 lb. axle with the 5 on 5.5″ rotor. Beware of what inner bearing and race are used on your application, as there is a difference in the small pattern rotors. The National A17 shows a 1.3772 (34.981mm) inner bore on the bearing and a 2.3622 (60mm) outer, which is smaller than the National A18 bearing that rings in at 1.4961 (30mm) on the inner bore and 2.4803 (63mm) on the outer. Both carry the same A18 bearing. If you are unsure of what spindle you have, grab a measuring caliper and check that inner bearing register on your spindle with these inner bore dimensions. And please refer to this drawing for your caliper mounting dimensions.

It is possible that these brackets will work on the D100 spindle, but it is unlikely that the small pattern D100 rotor will fit the Dakota or D150 spindles, because of this diameter difference.
I would love to be proven wrong on this!  And now I was proven wrong, we are good to go!

The Dakota and D150/B150/B1500 use the same bearings and grease seals.

National A18 inner bearing with 38mm ID and 63mm OD. And all the spindles use the same A16 outer bearing with the 21.999mm ID and 45.974 OD.

Below are likely to be able to use these caliper brackets.

If you need further assistance, send me an email at info@industrialchassisinc.com or text to ‪(480) 535-7774‬ to learn how to purchase a pair.