Look 'em up for the 96 3/4 ton, possibly the 'light duty' fellers. There are some variations in there, and at some point, the 3/4 tons got dual piston calipers. You don't want those, you want the single piston fellers. (piston is larger than the 1/2 calipers, but, mounting points are exactly the same.)

 

Thanks I'll see what I can do this weekend