Hi so I am about to commence my build when I noticed on my recipient car that below the area where the brake master cylinder enters the brake booster is a trace of rust which appears to be a history of brake fluid leak. Is there a gasket that needs to be replaced or is this an indication that the master cylinder or the brake booster needs to changed? I have no prior info on the car as I got the car with out engine and tranny. Thanks in advance for your input guys.