Need full width info.

[broncomania]

the 76 will have drums and a 77 will have disc. the 78 and up will have cast wedges. I think the 77 will have the thickest axle tubes also..mine are 1/2 wall thickness. 76-77 weld on wedges,HTH,Chuck

76 do have disc brakes.maybe not all of them but the ones ive stripped have had disc. 76/77 both are weld on c wedges. hp44
67" wms to wms thick axle tube.

note: the only reason for the thicker axle tube was because the c wedges were being welded on. the heat from being welded required thicker steel tube.