1.  Yes, the disc width at the hub is around 0.25", the drums are typically less, I'd measyre the 67's drums to be sure.
2. Housing widths; from the data I have:
   65-66 - 57.25"
   67-70 - 59.25"
   Check out this link: https://m.roadkillcustoms.com/ford-9-inch-rear-end-widths-and-potential-donor-cars/
3. If this refers to the ‘small’ axle bearing (2.835” Diameter) vs. the “large” bearing (3.15”), IMO, if this is a street car, I wouldn’t worry about the using the small bearing.  I run the small bearing (28 spline), but I don’t do anything that would challenge it.  If you doing “serious” driving that may require bigger axles, you might want to go to the large bearing. 
4. I run the 3” housing ends (57-59, 9” rear).  I elongated the holes in the spring plate, and backed it up with a 0.25” plate with holes for the 3” tubes and haven’t had any issues.
 

Width is same except the drums are a little thinner than the rotors.  Use Dorman 610-441 studs. They are longer.
A 65-66 axle in a 67-70 is a straight bolt in and gives extra 1” on each side. I did that on my 68 coupe that Ramses now owns.
The Torino style housing ends are same as big bearing ends but use 3/8” bolts instead of 1/2” like older 3.150 bearing flanges.  You will need the Cobra brackets for the large bearing housing.  They have all the bolt patterns that were used including the correct holes for the Torino ends.
Using a tapered style axle housing requires use of a small bearing bracket set. If you go with non-tapered housing, you will need appropriate u-bolts and shock plates to fit the larger diameter. Your car may already have the correct ones.

TKOPerformance wrote:

Okay, I've got all the parts for my 9" center section ordered.  I'm still carefully weighing my housing options in terms of width.  I may end up having a custom width housing made.  The biggest thing is I don't want to run wheel spacers, so my choice are probably either a custom width housing or wheels with a custom backspacing (which may well be the cheaper option but I need to verify that).  

On the brakes, I'm going '94-'04 Cobra.  What hoses should I run?  What master cylinder?  

If you’re going with non-power disc brakes, I have a used master cylinder that was for a 94/95 Cobra SVT, 15/16" bore, Raybestos #MC390269.  Let me know if you’re interested in it.  This MC was recommended by Baer Brakes when I installed their rear disc brake setup (20-years ago). 
IMO, this non-power braking did require a slightly higher pedal pressure, but it was not unmanageable. 
 
I'd use SS braided brake line hoses.

 

I used Inline Tube (Motorcity Musclecar on E-bay) flexible stainless DOT lines and were reasonably priced.

I used 3 piece lines per corner (Banjo, hose, inverted flare).

This selection allowed me options for clocking and change fittings without having to get a new flexible line.

This allows any future changes if desired or required.

Last edited by Nos681 (3/13/2026 10:40 PM)

The stock cobra front hoses are 3/8 threads SAE on one side and 7/16” (but still 3/16” tube size) on the other.
I have some generic braided hoses on my 66 now, but used to have the original type.  All you have to do is use a 7/16” thread tube nut for 3/16” tubing. You will have to make new hard lines for the front as the original location does not work well, at least on 65-66.
Make custom hard lines for everything