65 Mustang Coupe Rearend

Me and my son are completely restoring a 65 Mustang Coupe and we were wondering if there is a 9 inch posi rearend off of some other vehicle that would boltup? Minor modifications would be OK.

If not is there a way to make the stock rearend posi-trac?
Thanks in advance.
Rick

If you have an 8 inch now, just keep it. It should work fine.
I still run my 8 inch.
You can get traction lock units for both the 8" and 9".

Only bolt in 9" as i remember is out of like a 57 Fairlane.
All others are going to be too wide and srping perches will not line up.
There is always the option of having your 8" tubes welded to a 9" housing.

65-66 Mustang 57.25 inches
67-70 Mustang 59.25 inches
71-73 Mustang 61.25 inches 77-81 Versailles 58.50 inches
74 Maverick 8" 56.50 inches
75 Mustang II 8" 57.00 inches
67-73 Mustang, Torino, Ranchero, Fairlane 9"
59.25 inches to 61.25 inches
57-59 Ranchero and station wagon rears, 57.25 inches
66-77 Bronco 9", 58 inches
77-81 Granada/Versailles, 58 inches
67-71 Comet, Cougar, Mustang, Fairlane, 59.25 inches
71-73 Mustang, 61.25 inches
64 Falcon 58 inches?
67 Cougar 60 inches
67 Fairlane 63.50 inches (coil springs)
72 Ford Van 3/4 ton 68 inches
73-86 65.25 inches
57-59 Ranchero and station wagon 57.25 iches (narrowest 9" housing)
66-77 Bronco 58 inches but has 5-on-5 1/2 inch diameter bolt circle
67-73 Torinos, Rancheros, Fairlanes 59.25 inches or 61.25 inches
67-71 Comets, Cougars, Fairlanes 59.25 inches
Fox 59.2594-98 61.0
99+ 62.5

In the next few weeks I expect to be removing a 4.11 spool posi gear, 9"er, early ford rear axle assy. from a newly purchased '65 F/B. I just put lowering blocks on the car and everything lined up fine, the shocks seemed to be extended to their max. with 2" blocks. It is located in central Florida, if interested. Trying to get the car back to original and going back to the 8" rear assy. Thanks

Rick -

Flange to flange a 57-59 big ford( galaxie, etc.) 9" rear is roughly the same dimensions(52 1/4 for a 65-66 stang and 52 even for the 57-59 ford).I bought one on ebay for $300 (housing, axles,66 stang backing plates and parking brake cables) and it worked fine. If you are not concerned with 31 spline axles, the 28 spline should work fine, 65-66 8 inch axles will work. The center section and a posi setup you can find at a number of places, ebay and others on the net.

Originally Posted by tweet66

65-66 Mustang 57.25 inches
67-70 Mustang 59.25 inches

Although there is a 2" difference in the overall width of a 65-66 and a 67-70 Mustang rearend, will everything else line up to install a 66 rearend into a 67? If so, I may be interested in that rearend you have 65 Rocketman. I have a completely rebuilt 8" w/ 3.55 posi and disc brakes in my car now.