Brake Booster, Master & Pivot Box - 8" -55-64 Full SizeFull Size Cars 1955 64 Bracket & Pedal Assembly 8 " Dual Diaphragm Booster, Master Cylinder Bracket, Cast Iron 1" Bore 9 16" & 1 2" Ports on Both Sides so it can easily be mounted for LH or RH drives or to keep the lines away from obstruction or heat etc. Includes Pedal Box pivot Assembly. 150, 210, Bel Air, Impala, Biscayne **This is for disc drum and drum drum application not disc disc. Delivery is covered on this when ordered and paid online for