The front diff was cleaned up, painted and upgraded with late 40/60/70 front disc knuckles, spindles, axles, hubs, backing plates, disks, calipers and soft/hard lines. A new bearing and seal kit was used with the replacement components and the knuckle bearings centered and shimmed in relation to the front axles on the new hardware. The old rear diff with 8 bolt drum backing plates was replaced with a 76 series diff with 4 bolt disk backing plates Track is the same although spring perches are slightly different requiring old perches to be ground off and new perches welded on in the correct location / angle. The rear housing supports 70 series backing plates for the handbrake and rear disc brake components. A new bearing and seal kit was used with the replacement components New brake hard lines and hardware run and new brake hoses added.