Hey All- It’s been awhile since I posted but looking for some advice. When I was converting the drum brakes over to disc on my ‘73 I picked up a set of disc brake spindles off a Granada (forgot the year they are off of) and bolted them on, used a ceramic coated single piston caliper, some nice slotted/drilled rotors and a Wilwood master cylinder. I could never get this thing to stop the right way for the life of me. Today I decided I had enough and decided that I was going to upgrade the brakes to the 4 piston #140-11074 Wilwood Dynalite system , so I called and talked with a tech at Wilwood. He said thats the setup he wants me to use but it will not work with the Granada Disc spindles but only with the drum or disc spindles from the Maverick or a few other select Fords...and my original spindles which are long gone. He said the reason the car wasn’t stopping is the single piston caliper and their 7/8” bore piston master cylinder is not meant to work together. I guess what I’m asking is what drum/disc spindle will bolt on as I’ll try and locate what’s available. As always...thanks and the best place for answers is here! Denny
Did he have any recommendations on a master cylinder that WILL work with the single piston calipers ?
Sounds to me as if you're going to toss out the baby with the bathwater. I have a '74 Maverick Disc/Drum MC on my '72 that has single piston '69 Torino brakes(no the four piston system won't bolt to those spindles either). Stops fine. It's not power so pedal is a little heavy, one of these days I may add a booster and then I may not. The Maverick drum spindle is same as '70-'71 Torino, Ranchero, Cyclone etc & '70-'73 Mustang & Cougar. Actually '68-'69 are also same but spindle and tie rod pin size are slightly smaller on those. For my Fairlane, I'm thinking about using the four piston disc brake kit chockostang sells. I already have a NOS booster that will fit.
The least expensive fix would be to swap out the willwood master for a 74 Maverick disc master cylinder like Tom said. If you’re set on stepping up to the 4 piston Willwoods you will have to swap out the disc spindles for drum spindles.
I wanted to ask him that but got sidetracked and never did. I’m sure a OEM would probably do the job. I’m assuming
Maverick/Granada disc brakes will stop the car just fine. I think you have other issues, like the master cylinder, as stated.