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Old Apr 13, 2016 | 05:14 PM
  #1  
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Hydroboost gurus

So I am considering going hydroboosts on my rebuild of 1978 f250. But I was wondering if anyone would happen to know the difference between the super duty hydroboost units that are recommended. And a1996 cobra Hydroboost unit?

The only reason I ask is I have the cobra unit laying around from a mustang part out
 
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Old Apr 13, 2016 | 10:15 PM
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Im not an expert on these things but from my understanding the hydroboost units are the same for the most part except for the pedal rods and some early Ford units have oddball psi in/out fittings. Also some have different bolt patterns for the master cylinder. If you have 1 laying around, try to bolt it up and see how close it is.


I used a booster off a 2008 F.350 for my highboy. The pedal bolted right up to the rod. The master cylinder also bolted right on. Then I just build an adapter for onto the firewall that was about 2" thick. Hydratechs' website is a great resource to find your line fittings.
 
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Old May 2, 2016 | 10:46 AM
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Sorry to Hijack your thread a little bit here, but had a question on late 70's Lincoln hydroboost unit. I got one out of a u pullet yard awhile back and the master cylinder's ports are on the passenger side of the vehicle, tried the master off my 77 f250 but the bore is too big to fit, anyone know of a master cylinder that fits that hydroboost unit with ports exiting toward the driver side? I will be upgrading to rear discs in the rear as well before it is back on the road.
 
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Old May 2, 2016 | 11:48 PM
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I used a 70s f350 MC. I had to slightly enlarge the mount holes to get it to bolt to my hydroboost.
 
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Old May 3, 2016 | 10:18 AM
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Is there a particular year F350 Master cylinder to use, based on rockauto some of the ones for the F250 Overlap some of the ones for F350 depending on year. Would the F350 one run 4 wheel disc just fine?
 
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Old May 3, 2016 | 10:57 AM
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Maybe get a Superduty master cylinder. I believe they exit the driver side and will have a larger fluid reservoir for your disc brakes when you upgrade.
 

Last edited by 650; May 3, 2016 at 11:01 AM. Reason: Misread question
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Old May 3, 2016 | 11:14 AM
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Get one from a junkyard, then you can get the lines with it. Makes getting fittings easier.
 
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Old May 3, 2016 | 02:00 PM
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I just checked the u-pullit yard and they don't have any super duties at all.
 
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Old May 3, 2016 | 02:34 PM
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Check lkq, car-part.com, or junkyard dog or use a Craigslist searcher like search tempest to find someone parting one out.
 
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Old May 3, 2016 | 04:49 PM
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That brings me back to my original question, looking at the ones for an 08 super duty, that's exactly what I'm looking for, but will it fit in the 70's Lincoln Hydroboost? Anybody know what the outside diameter of the super duty master cylinder bore is?
 
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Old Nov 1, 2016 | 11:56 PM
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Originally Posted by dannyboy_86
That brings me back to my original question, looking at the ones for an 08 super duty, that's exactly what I'm looking for, but will it fit in the 70's Lincoln Hydroboost? Anybody know what the outside diameter of the super duty master cylinder bore is?
Ever get this figured out?
 
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