Looking for brake dual master cylinder and booster - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 
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post #1 of 10 (permalink) Old 04-23-2019, 12:43 PM Thread Starter
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Looking for brake dual master cylinder and booster

I recently purchased a 1966 Galaxie 7 Litre with front disc and rear drum brakes (car is a basket case and not running). I'd like to covert to the safer dual master cylinder / power booster setup. My question is where can I purchase new or rebuild 67 and up brake MC / booster for this car? Thanks for any advise.
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post #2 of 10 (permalink) Old 04-23-2019, 01:03 PM
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I use rockauto.com. You can probably use a master from a '67 Gal. Just make sure you get one that matches your setup (disc vs drum, power vs manual, etc).
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post #3 of 10 (permalink) Old 04-23-2019, 01:39 PM Thread Starter
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Re: Looking for brake dual master cylinder and booster

Thanks for trying to help. Looks like they only service (rebuild) your existing booster. I currently do not have one. That is why I'm looking to purchased an existing set of MC & booster.
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post #4 of 10 (permalink) Old 04-23-2019, 03:05 PM
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Re: Looking for brake dual master cylinder and booster

There are many many threads here from people doing just what you are trying to do. Good luck!

Putts drives a 1965 customized Galaxie. Rebuilt 390, 4100 electric choke on a Performer, MX, AC, PS, PB w Scarebird front discs on Cragar 17" S/S.
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post #5 of 10 (permalink) Old 04-23-2019, 03:54 PM Thread Starter
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Re: Looking for brake dual master cylinder and booster

True, but I haven't uncovered one that states "I purchased my booster & MC from ????" The posts I've seen only tell me what they have, not where they got it. Gearhead was kind enough to point me to Rock Auto, but they only rebuild.
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post #6 of 10 (permalink) Old 04-24-2019, 07:30 AM
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Re: Looking for brake dual master cylinder and booster

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Originally Posted by 7 Litre View Post
True, but I haven't uncovered one that states "I purchased my booster & MC from ????" The posts I've seen only tell me what they have, not where they got it. Gearhead was kind enough to point me to Rock Auto, but they only rebuild.
Hello 7 Litre,

Your best bet may be an aftermarket route on a booster/bracket setup and then you can put on a master from a '67/'68 disc system on it. The reason why is the scarcity of original equipment parts. I've been hunting down 3rd gen galaxie parts (65-68) for quite a few years and I've rebuilt a few of varying brake systems of them. The biggest problem is the boosters. These cars are getting old, really old. It doesn't pay for companies to stock boosters for something that they might sell one or two a year. Add to that the lack of rebuildable cores and at best you can find places to overhaul your existing core as you've noted.

On your 7 litre the Service manual shows it's a Bendix booster. Now on the 65-68 gals with non Kelsey Hayes brakes (7 litre brakes) Ford uses Bendix and Midland Ross boosters and they will NOT interchange on the bracket assembly bolted to the firewall. I don't know if your 7 litre booster (looks to be a dual diaphragm Bendix) will interchange with another Bendix dual diaphragm or a Midland Ross from '67/'68.

As you can see there are a lot of what if's and that's even if you're lucky enough to find the correct parts. My suggestion would be send your booster off to be rebuilt or you might be able to buy the rebuild kit and rebuild it yourself, although if you have never rebuilt a Bendix booster I would probably stay away from that option as you'll need to buy or make some tools to complete that task and you'll find it cheaper sending it in for rebuild.

You should then be able to purchase a '67 or '68 disc brake master and retrofit your car.

A couple more points. If the car has sat a long while you might want to replace the proportioning valve in the car as the seals are probably compromised. It's doubtful you'll find the same one but will have to retrofit something more generic in its place.

One last point to consider is where on the original system the residual pressure valve for the rear brakes is located. You'll want to replace that as well or the brake pedal will feel as if it has more travel before the brakes engage.

Good Luck.
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post #7 of 10 (permalink) Old 04-24-2019, 10:00 AM Thread Starter
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Re: Looking for brake dual master cylinder and booster

Thank you DesertXL for taking the time to write with the knowledge you have on this subject. I'll start searching now and try posting back later as to what I've come up with as it may help others later on down the road.
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post #8 of 10 (permalink) Old 04-28-2019, 05:36 PM
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Re: Looking for brake dual master cylinder and booster

7 Litre,

I didn't realize you had nothing to work with. In that case Desert XL has the right approach. On my 1964 Lincoln I replaced the stock booster and master with an aftermarket 8" dual diaphragm booster. I got mine from Speedway motors but there are plenty of other sources. You can get the booster alone or with a master cylinder attached.

Be aware this is probably not a simple bolt in. For example, on my Lincoln I had to buy a pushrod to match it up with the brake pedal. I think I used a Mustang application. The firewall mounting holes were not standard so I had to modify them slightly to match up with the booster. I also had to shorten the booster pushrod.

You will need to decide the master cylinder bore you want. I just looked and found the '67 Full size Ford with disc brakes came with a 1" bore master. You will probably want to stick with that. A larger bore will result in more pedal pressure.

You can also get 7" diameter and 9" diameter aftermarket boosters. Be sure to measure your car to make sure the booster will fit. My '65 Galaxie does not have power brakes so I can't be of much help here.

- John
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post #9 of 10 (permalink) Old 04-29-2019, 10:03 AM
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Re: Looking for brake dual master cylinder and booster

7 litre,


I just finished a front drum to disc conversion on my '67. I ordered a Cardone Master Cylinder/Booster from Summit (Part Number 50-3100) and the '67 specific booster-firewall mounting brackets from Desert Valley Auto Parts, although I could have used the factory drum brake booster-firewall brackets. The "correct" factory disc brakes brackets changed nothing related to depth of the booster to the firewall, only raised the disc brake master cylinder/booster up higher which made no difference, because the pre-bent lines I ordered that were for the M/C to the Fluid Distribution Block weren't even close to bent correctly (bends had to be highly modified). You don't mention whether your factory disc brakes are power. If they are, then your factory booster-firewall brackets should be ok, provided they will attach to the booster. If your factory brakes are manual, then you may have to investigate further. I used the Ford Parts Catalog extensively to determine what was interchangeable between '67 factory front drum and factory front disc brakes. I'm sure you could do the same for differences between '66 and '67 disc brake parts. I used all factory '67 disc brake components, except for the actual brakes (calipers, rotors, hoses) which are Wilwood.
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post #10 of 10 (permalink) Old 04-29-2019, 02:00 PM Thread Starter
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Re: Looking for brake dual master cylinder and booster

Thanks for the follow up info gearhead & 67XL. I ordered a 67 booster/MC combo off Ebay a few days ago in order to get it sooner. Yes I have the stock front power disc and rear drums on my 7 Litre. The stuff on Ebay is most likely Chinese junk so I hope it works out. I'll post later once I get all my components in and let you know if everything worked out. Thanks again!
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