66 hertz master cylinder

[ShelbyGT1099]

I'm looking for a 1966 hertz master cylinder part number is 704B1

[Bob Gaines]

I'm looking for a 1966 hertz master cylinder part number is 704B1

Not all Hertz cars came with the Mico Master cylinder unlike urban legend. Car numbers of Mico equipped Hertz cars are listed in one of the past registries. I would suggest confirming if you have not already done so given the Mico are very hard to find and typically very expensive if you do find one. Rebuild kits for one needing rebuild are virtually non existent. On top of all that the Mico imparts a terrible brake pedal feel when compared to a typical Mustang disc brake master cylinder. It is certainly not anything you want for high performance driving. SA fixed the Hertz customers braking complaints by substituting the stock GT350 semi metallic high performance brake shoes with typical passenger car brake shoes of the same size. I for example was relieved when I found out my Hertz car was one of those that did not receive the Mico master cylinder recall  prior to restoration of my car. With all that said if your car did indeed come with the Mico than I wish you all the best in sourcing one.