Ok, what are yall useing now to put disk on a 9 inch ? I know there are kits, but for a do it your selfer ?

This is what I do. Get front brake rotors for a '91 town car (they are hats only no hubs) I use late model GM metric calipers '86 Camaro (older fullsize GM calipers will work also just need a diff. bracket) You can make your own or get them from Speedway Motors. You must weld them to the rearend because of the hat offset they won't bolt to the axle tubes. You may need to grind a little bit off of the axle flange to fit in the hat. If you want emergecy brakes you will have to use different calipers $$. I have done 3 cars this way no problems. This is for 4 1/2" bolt pattern if you have 5" you must get rear hats of a ?? Toronado (its been a few years since the 31 spline I did) Hope this makes sense I'm better at doin than explainin

Later, Mark

Another option is buying a bracket that uses re- drilled GM rotors and late model rear cadillac calipers that have the emergency brake lever on them. Go to EBAY and type in "9 inch ford brakes", there's a guy manufacturing and selling bolt on brackets for this application. He also sells the pre-drilled GM rotors.

I made my own rear disc brake setup,a friend had the weld on brackets for mid seventies calipers I copied them used lincoln verseai rotors,another option:Car Quest rotor#5115 90 jeep grand waggoner rear rotors,3in.tall,11in.dia.5-41/2 pattern.Be sure that rotor is flat no axle,ran into minor trouble inside dia.rotor 6 7/16,axle hub 6 3/8 had to do alittle machining inside rotor.Mock axle,and rotor the way its going to be,the brackets may need to be radius some more to be sure pads are completely down over rotors,may be some minor knotching to fit calipers to brackets.
Put everything together,place over rotors,I suggest maybe putting a .005-.010 shim between stationary pad and rotor so not to tight apply air pressure to caliper to snug in place and tack weld in place,I made some gussets used them to from side of brackets to housing,check everything finish welding.Parts America store 7/16-20 to 3/16 hard brake line part #327853 to hookup brake line,be sure to use copper washer,also used small amount of silicone pipe sealant.You will probably have to get longer wheel studs,take out your proportionig valve.I run manual brakes no run for booster I tried a 69 Camaro manual m/c for 4 wheel disc I didn't have enough pressure to work it was 1 1-4 bore went back to small bore m/c works fine, hey in streetrodding what ever works no rules,didn't mean to get lenghthy just trying to help.Also A friend told me silcone brake fluid won't work very good with these pressure switches for brake lights.Hope maybe this helps