What years are these hydraulic backing plates???

[Mart]

Ah I get it now. the housing is circular rather than 4-eared. Gotcha.

[V8COOPMAN]

Originally Posted by L-head

JSerry is showing the area that I am referring to. Maybe the correct term would be "patina" or less rusted. Passenger car housings are shaped different in this area. With these backing plates, the 3/4t full floating hubs, and truck axles you have the beginnings of "dirt track" race car rear end. Brake shoes and hyd cyls are the same as passenger cars.

NOW I understand 'the shadow'! Sure 'learned-me' somethin' new today. DD