Power Brake Booster- 1970 Mercury Cougar-BENDIX-Concours-Restored. We have them rebuilt in North America. 1970 Bendix Power Brake Boosters can be used with 1970 to 1973 Mercury Cougars. It has the straight shaft versus the tear drop shaft. This item has a $250 Core Charge which is refundable if a complete BENDIX (same model/year) rebuildable core is provided.