I thought about pulling the Bendix brakes off a 67 3/4 ton with the HO54 Eaton axle. I has 13X3 brakes but the rub is that the hubs are different too so if I took the hubs for my rig the wheels wouldn't fit inside the fenders which is too close anyway. The same issues exist if you swap a post-72 corporate 14-bolt axle. Although, Grigg has worked out that a chassis-cab dual-wheel axle with single wheels on it will have the same track has the original HO72 (see Tons of Fun Forum). In years past, I have seen a number of 3800 trucks sitting in bone yards with all the brake parts stripped.
There are shops that reline drums, mostly Pontiac and Buick and Corvette aluminum drums that had iron liners. I inquired of one shop and was told they would have to have the drum to see if they coule do it. Fourteen inches was at the limit of their equipment.
