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66steelriver

I have a 1966 I6 Mustang Convertible. I'm going to replace the brake drums, shoes, wheel cylinders, hardware, hoses,lines. I also will be changing from the '66 single master cylinder to a dual master cylinder from '67.

I've seen & heard different answers as to which is the correct rear brake shoe size. I'm hoping that someone might be able to provide information/advice regarding this question.

The issue is whether or not the '66 I6 Convertible has different size rear brakes (ie. 9 x 2 1/4, same as the front) than the 66 coupe/66 fastback (9 x 1 1/2). Some of the people I've talked to have the 1 1/2" and some have the 2 1/4".

Currently, my shoes are 1 1/2" (with a backing plate for 1 1/2" shoes). However, I wonder why I see so many publications listing the 2 1/4" rear shoes as correct for the '66 I6 convertible specifically.

phil40_1

According to my information from the FORD microfiche, the 1965-1966 Mustang 6cyl. convertible uses 9 x 2 1/4 shoes front and rear, the coupe/fastback used the smaller rear shoes. So my guess is that at sometime in it's life someone either changed the rear end or changed the rear brake assemblies. It's also possible that the car could have been misbuilt at the factory, i've seen alot of strange stuff over the years.

Hope this helps, Phil.

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