[stallion112]

What are the best options for upgrading Mustang II front disc brakes to a more modern system? I want to keep the OEM spindles in place if possible.

[RagHead]

If you mean larger rotors you can get brackets that will adapt GM calipers to the original Mustang II spindles to allow the use of the larger Granada rotors.

[stallion112]

Thanks. The car I have now actually has the GM conversion on it that you mentioned above. I believe it uses 1969-1974 Nova calipers.

Since this conversion was done many years ago I was interested in going to the next level and purchasing a set-up from the aftermarket if it made sense.

Is there a noticeable difference just going with a dual piston caliper and sticking with the stock rotors? Any recommendations from guys that have experience with aftermarket options would be helpful.

[RagHead]

If you have the GM conversion you are running the 11 inch Granada rotors as the stock rotors are 9 inch. You could upgrade to the 13 inch cobra brakes but you will have to go to a 17 inch wheel. For street/strip I would stay with the 11 inch rotor setup. If you just want to upgrade, put disc on the rear.

[fordguy_78]

How about this setup it's the drilled and slotted granada rotors, with wildwood dana light 4 piston calipers. The first image is most of what i used.

http://www.supermotors.net/getfile/6...l/untitled.jpg
http://www.supermotors.net/getfile/6...e/img_0534.jpg
http://www.supermotors.net/getfile/6...e/img_0536.jpg
http://www.supermotors.net/getfile/6...e/img_0537.jpg
http://www.supermotors.net/getfile/6...e/img_0538.jpg
http://www.supermotors.net/getfile/6...e/img_0539.jpg