I have a 67 GTA with front disc. I want to upgrade to 13" rotors. I know that the 70 -73 spinles with fit if you drill out the ball joint socket a little.

My question is will 90 model spindles work?

I already have the calipers, and hoses that I want to use. So I dont want to buy a kit to do it.

 

The 67 Disc brakes are 11 19/64" in diameter--11 1/4" in reallity.

You want to go to 13" rotors-Why? The gain of 1 3/4" is not necessary for street driven car. A Full Road race machine, a different story.

Next, you do not have to do a thing to the ball joints, or spindles to put 70-73 Mustang Disc brakes on ANY 65-73 Mustang, all are same taper.

90 Model Brakes are a waste on the Vintage Mustangs. They were better Factory/Stock.

Dan @ Chockostang

 

Hey Dan,
If he uses the 70-73 spindles wont he have to use the 70-73 outer tie rod?

 

Yes the tie rod end has the match the spindle year,Being a 67 i would do the factory 4 piston disc it will out stop the 2 piston cobra brakes.

 

check out www.mustangsteve.com he has a kit to use the late model 13 inch brakes on the classic spindles

 

Yes on the Tie Rods, use the 70 Mustang OUTERS, but on the Ball Joints, you don't have to do a thing, drop them on.

Dan @ Chockostang

 

thanks guys.
I'm going a different route now. I'm still putting 13" rotors on but with Wilwood 4 piston calipers. I'm going to have to make my own brackets which are not a problem. My company owns a machine shop, comes in real handly at times.

does anyone have the drawings or dimensions of the spindle bolt hole locations so I can make the bracket. I would like to go ahead and make the bracket before I start taking it apart.

 

Why make a bracket when wilwood makes a kit for it now?