[JimP]

Update.... I do not have the Napa 3700142 booster! I have the NAPA 5473201 booster. This currently is the only booster listed for the Mustang II on Napa.com. 3700142 is not even a valid part anymore. I purchased this last year and forgot about the problems I had trying to get the 3700142 booster I was told that the 5473201 was the new replacement. It fits perfectly to the master cylinder and the pedal assembly, it just seems like the rod should be about 1/2" longer to move the pedal up a little more. I'm going to leave it for now until I get the car running and then I might drill new holes for the brake pedal after I see how it works. Just thought you might want to know about the availability of the booster required and what problems the replacement may cause.