FYI FORD - MustangSteve's Ford Mustang Forum
The Internet's Most Knowledgeable Classic Mustang Information
IF YOU HAVE A QUESTION ABOUT CLASSIC FORD MUSTANGS, YOU HAVE COME TO THE RIGHT PLACE!
MustangSteve has over 30 years of Mustang experience, having owned 30 of them and restored several others. With the help of other Mustangers, this site is dedicated to helping anyone wanting to restore or modify their Mustang.... THERE ARE NO DUMB QUESTIONS!!!!!
Visit MustangSteve's web site to view some of my work and find details for:
FYIFORD Contributors' PICTURES - Power Brake Retrofit Kits for 65-66 Stangs - Classic Mustang FAQ's by MustangSteve - How to wire in a Duraspark Ignition - Mustang Ride Height Pictures and Descriptions - Steel Bushings to fit Granada Spindles to Mustang Tie Rods - Visit my EBAY store MustangSteve Performance - How to Install Granada Disc Brakes MustangSteve's Disc Brake Swap Page - FYIFORD Acronyms for guide to all the acronyms used on this page - FYIFORD Important information and upcoming events

You are not logged in. Would you like to login or register?

  • Index
  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » 66 Mustang Rear Brake Hose - Using 69 Mustang Hose

    • 1 of 1

       

    3/24/2026 2:23 PM  #1

    Michael H.
    I FYI 24-7

    Offline

    From: Laurel, MS
    Registered: 4/01/2013
    Posts: 930

    66 Mustang Rear Brake Hose - Using 69 Mustang Hose

    I've been doing some work on my Father-in-Law's '66 coupe, and I need to make new hard lines from the brake hose out to the wheel cylinders on the 8 inch rear end.  I've been doing some searching and reading on here about using the '69 Mustang brake hose since this car will eventually have dual exhaust. 
    My question is, when using the '69 brake hose on his '66, which axle vent nipple should I use? 
    Is the '66 one too long?  If so, should I just cut it down, or should I get the nipple for a '69?

    Last edited by Michael H. (3/24/2026 2:23 PM)

     

    3/24/2026 5:31 PM  #2

    MS
    Forum Originator

    Offline

    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,731

    Re: 66 Mustang Rear Brake Hose - Using 69 Mustang Hose

    The 65-66 dual exhaust hose and the 69 hose are very nearly the same. The difference is the length of the hollow bolt that attaches it to the housing. You can shorten the original one and rethread it for 7/16” fine threads

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    3/25/2026 9:48 AM  #3

    Michael H.
    I FYI 24-7

    Offline

    From: Laurel, MS
    Registered: 4/01/2013
    Posts: 930

    Re: 66 Mustang Rear Brake Hose - Using 69 Mustang Hose

    I'm probably overthinking this but these are my current thoughts:

    '66 dual exhaust hose
     - Pro:  Already has the correct inlet size on it.  (No need to change the fitting on the hard line on the body.)
     - Con:  Might not be able to find a replacement quickly in most small towns.

    '69 hose
      - Pro:  Might be more likely to find a replacement quickly in most small towns.
      - Con:  Requires modification to the hard line on the body.

    Are there other Pros or Cons I'm missing?  What did you use on your '66 ?

       •Thread Starter
     

    3/25/2026 12:34 PM  #4

    TKOPerformance
    Hyper FYIFORD ADDICT

    Offline

    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,935

    Re: 66 Mustang Rear Brake Hose - Using 69 Mustang Hose

    If you're that worried about finding a replacement, but 2 and keep one in the trunk as a spare.  

     

    3/25/2026 1:21 PM  #5

    MS
    Forum Originator

    Offline

    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,731

    Re: 66 Mustang Rear Brake Hose - Using 69 Mustang Hose

    Michael H. wrote:

    I'm probably overthinking this but these are my current thoughts:

    '66 dual exhaust hose
     - Pro:  Already has the correct inlet size on it.  (No need to change the fitting on the hard line on the body.)
     - Con:  Might not be able to find a replacement quickly in most small towns.

    '69 hose
      - Pro:  Might be more likely to find a replacement quickly in most small towns.
      - Con:  Requires modification to the hard line on the body.

    Are there other Pros or Cons I'm missing?  What did you use on your '66 ?

    Oreilly’s carries the 65-66 hose.  So does Summit

    Last edited by MS (3/25/2026 1:21 PM)

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    Yesterday 7:14 AM  #6

    Michael H.
    I FYI 24-7

    Offline

    From: Laurel, MS
    Registered: 4/01/2013
    Posts: 930

    Re: 66 Mustang Rear Brake Hose - Using 69 Mustang Hose

    My local Oreilly's doesn't carry the dual exhaust hose for a '66, but they do carry the '67-69 hose (see screenshots below)... which perfectly illustrates my point that it might be harder to get a replacement for the '66 hose in a pinch.




    Last edited by Michael H. (Yesterday 7:17 AM)

       •Thread Starter
     

    Yesterday 7:16 AM  #7

    Michael H.
    I FYI 24-7

    Offline

    From: Laurel, MS
    Registered: 4/01/2013
    Posts: 930

    Re: 66 Mustang Rear Brake Hose - Using 69 Mustang Hose

    TKOPerformance wrote:

    If you're that worried about finding a replacement, but 2 and keep one in the trunk as a spare.  

    I understand your point, and I could do that, but then the spare would be just as old as the original.  I'd much rather use a part that's easily available.

       •Thread Starter
     

    Yesterday 8:19 AM  #8

    Steve69
    Senior 24-7 FYI Addict

    Offline

    From: Madison Wisconsin
    Registered: 4/01/2013
    Posts: 2,806

    Re: 66 Mustang Rear Brake Hose - Using 69 Mustang Hose

    Check out www.rockauto.com 
     

     

    Yesterday 1:41 PM  #9

    TKOPerformance
    Hyper FYIFORD ADDICT

    Offline

    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,935

    Re: 66 Mustang Rear Brake Hose - Using 69 Mustang Hose

    Michael H. wrote:

    TKOPerformance wrote:

    If you're that worried about finding a replacement, but 2 and keep one in the trunk as a spare.  

    I understand your point, and I could do that, but then the spare would be just as old as the original.  I'd much rather use a part that's easily available.

    Available is a relative term for parts for a 60 year old car.  Just because the store near you stocks a part also doesn't mean that all those stores stock it.  I had to wait a day for something as stupid as a oil pan gasket last week.  20 years ago it would have been in stock.  These cars are getting to be fewer and farther between and stores don't keep inventory like they used to.  

     

    Yesterday 9:06 PM  #10

    Nos681
    Senior 24-7 FYI Addict

    Offline

    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,536

    Re: 66 Mustang Rear Brake Hose - Using 69 Mustang Hose

    Or you could use a stainless line.

     

    Today 7:18 AM  #11

    Michael H.
    I FYI 24-7

    Offline

    From: Laurel, MS
    Registered: 4/01/2013
    Posts: 930

    Re: 66 Mustang Rear Brake Hose - Using 69 Mustang Hose

    I've never used stainless brake hoses before.  I've heard they make a big difference in pedal feel.
    Honestly, it's not that much more expensive than the rubber hose.  $12 shipping is rough, but that's become pretty common, unfortunately.

       •Thread Starter
     

    Today 5:01 PM  #12

    lowercasesteve
    Senior 24-7 FYI Addict

    Offline

    From: Auburn, Ca
    Registered: 4/01/2013
    Posts: 1,293

    Re: 66 Mustang Rear Brake Hose - Using 69 Mustang Hose

    I've special ordered custom brake lines from one of the brake parts companies several times with no problems.  I just told them what connectors on each end and how long.  They got them out to me in less than two weeks.  Price was about what they would cost from a parts dealer.

    Sorry, I can't remember which one.  It was a long time ago.

    Whoops!  I always get stainless steel lines.

    Last edited by lowercasesteve (Today 5:02 PM)

    Original owner - 351w,T-5, 4whl disks, power R&P
     

     

    1 of 1

  • Index
  •  » FYI Ford, Classic Mustang Tech Discussion
  •  »  66 Mustang Rear Brake Hose - Using 69 Mustang Hose

    • Board footera


    REMEMBER!!! When posting a question about your Mustang or other Ford on this forum, BE SURE to tell us what it is, what year, engine, etc so we have enough information to go on.