Topic: 1965 Mustang Disc Master Cylinder

[Bob Gaines]

 I thought i would mention that although all of this talk about the numbers and date codes is very interesting,once installed the most important visibile aspect of the early master is the adapter. Even the Masters sold by Virginia pictured above are great and do not look out of place once sealed to the firewall and detailed with black semigloss. I think that NPD sells a brass flared adapter on both in and out  so as to simlate the early style master if wanting to disguise a new replacement master on a 65 /early 66. The numbers and trademark on the bottom are extremly difficult to read once installed . The main thing is the correct look on a highly visable item like this IMO.

[rodster]

Ahh, it helps when someone describes what you are looking at!   

Date code is Dec 23 for a schedule build of April 19 so I'm guessing it could be the original Master Cylinder.

Thanks. 

[livetoride60]

Mine also has the 618967 number, a Bendix "B", followed by a "5".   Cast in Julian date is 182, or July 1st.  Has the brass adapters of an early piece as well.

Anyone know for sure if the "5" means 1965, or just a reference #?

Interesting info.

[Bossbill]

Just to verify what I have, the 65 has a brass fitting top and bottom whereas the 66 no longer requires the adapter on the front (has the flare built into the master), but still requires the brass fitting on the bottom?

[J_Speegle]

Just to verify what I have, the 65 has a brass fitting top and bottom whereas the 66 no longer requires the adapter on the front (has the flare built into the master), but still requires the brass fitting on the bottom?

65 have fittings and 66 have no fittings at either brake port originally would refer to the master cylinder not the build date of the car from what I believe we have found and what I believe currently

[Bossbill]

Master has front flare and the bottom looks like a 45 deg taper into master.

Pics

[Bob Gaines]

FYI,I have seen evidence to suggest that the changeover wasn't specific to model year and that some early regular production 66 Mustangs used the brass adapters on both ports. It may have something to do with using up supplies or something else. It wasn't like the change interrupted anything given the brake lines will work with ether style. 

[J_Speegle]

Have had an ongoing page in my spread sheet attempting to track the relationship of the date, date coding style and the style of port to see what that tells us.

Like many things it takes time to collect the data