Hi, I think my 1971 LeBaron brake booster failed two weeks ago. Brake pedal went really hard to push and vacuum is leaking when pedal is pressed. Leaking voice can be heard clearly. This makes also engine running bad when idling, if brake pedal is pressed, but thats not really problem for me. Vacuum powered parking brake automatic release mechanism works fine. I'm interested to hear if someone has bought and installed "Pirate Jack" (china repro) brake booster. Mopar 8" Dual Power Brake Booster Kit for Fullsize Chrystler Cars, Dodge Trucks | eBay Later I might also send my original brake booster unit for rebuid. But now I want to enjoy short summer and I need a booster that Works. We have mandatory safety inspections every year at Finland. My "Imppu's" inspection is between August 8th and September 2nd. I need working brake booster at least then or I can't drive Imppu before fixing it. I think that my brake booster is Bendix dual diaphragm booster. How can I be sure?