can anyone tell me what rear disc brakes I can put on an old 9inch?

 

You need to figure what housing ends you have first then we can go from there. Look online for 9" bearing flanges for measurements and compare to yours.

 

Old is a relative term on this site as well as life in general.

 

mspin54,
These Wilwood D154 rear brake kits fit multiple rear ends. Once you figure out which 9 inch housing you have, then you can select the correct kit.

Wilwood High Performance Disc Brakes - D154

I have a custom 9 inch housing with the late Ford Big bearing ends and I selected one of these kits for my 48 F1.

Some would say a little pricey; however, when it comes to safety, how much is your safety worth?

Philip

 

Go to a junk yard and get the rear brakes off a 1996 or newer explorer...they bolt right up and are cheap. If you would rather have a new set then look into the FRPP line or https://www.amazon.com/Ford-Racing-M.../dp/B009XRPBGY

 

the diff I have is off a 57 ranchero, i'll go out and take some measurements and go from there, thanks for all the replies

 

That should be a "old" style big bearing flange. here is a page with all kinds of links https://www.google.com/search?q=ford...HaSmC-EQsAQIaQ

There are several manufactures who make a disc kits for these, you would have to decide if you wanted plain, drilled or slotted rotors, parking brake, multi-piston calipers, etc...