Unless you are adding a supercharger or twin turbos the rear end you have now will be just fine, Have you looked at that thing? It's HUGE!!! It's as big as a truck rear end. I doubt very seriously that you'll break it.
That being said there is one down fall. There are no gear sets for this rear end. The non air conditioned cars came with a 2.93 gear and the air conditioned cars came with a 3.21 I believe so there are no real "performance" gears available. Also I doubt any aftermarket posi units will work so you'll have to find a posi from a commercial chassis like a hearse or ambulance. They are hard to find but they are out there.
Scarebird is supposed to be making us a rear disc brake kit for the '65-66 Cadillacs. I spoke with them not long ago and reiterated that we were still very much interested in this rear disc brake kit. I asked him how far along he was in developing the kit and he acted embarrassed and admitted it was a "back burner" project but he would try to step it up and get it done sooner. I've been trying for about 2 years to get this done with Scarebird but it hasn't happened yet. I arranged for a rear axle to be sent to him so he could use it for his prototype and I've followed up continuously. I know about a dozen guys on 4 different Cadillac forums that have expressed serious intrest in the rear disc brake conversion but Scarebird seems to already have enough business to keep them busy.................
Doesn't summitracing offer a rear disc brake conversion kit for the Cadillac? for 300 or 400 dollars?
I want a front disc brake conversion kit @ scarebird brakes a saw the front does this include everything or just the brackets? Thinking about making my own conversion with Corvette front brakes. We did a conversion with corvette brakes on a firebird aswell so i think it will work.
Please let me know what you think about the rear disc brake conversion @ summit racing!
That's interesting about the kit SUmmitt sells. I'd never seen that one before. I wonder why the axle type says 9" Ford even though the aplication is for a '65 Cadillac? Axle flange type is also listed as Big Ford. Why?
If I'm not mistaken the Scarebird front disc brake kit is for the brackets & spacers only. Then they give you a parts list of common GM parts to finish the installation, like rotors, calipers, etc.
Oh ok you know how much without shipping the total conversion will cost? Just looking what would be wise making a conversion using scarebird or doing it myself still got some corvette brakes laying arround some where so only need to make a bracket spacer and order bearings. Yes indeed i noticed aswell. I not bought it cause im not sure it will actualy fit a caddy.
Instructions and parts list in the link above. Looks like $165 for the brackets.
One more thing................the drum brake wheels will not work after converting to disc brakes!!!
Here is how I converted my '66 Coupe DeVille to disc brakes....................
Use 1966 drum brake spindle (original)1969 disc brake bracket (salvage yard)1969 backing plate (salvage yard)1969 calipers & pads (new)1969 bearings (new)1969 booster & master Cylinder (new, can also use Corvette style booster)1969 proportioning valve (or buy universal adjustable from Jegs or Summitt)1972 1 piece rotors (new)1972 grease seals (new)1969 & up disc brake front wheels (salvage yard or new aftermarket wheels)1969 brake hoses routed in front of spindle rather than in back. (new)
Everything is available at the parts store except the disc brake bracket, backing plate and wheels.Those will be salvage yard pieces. Everything bolts up like it belongs. It's an EZ conversion. The reason you use '72 1 piece rotors rather than the '69-'71 2 piece rotors is that they are a LOT cheaper!!!
Hope this helps!!
What you mean with the drumbrake wheels will not work? you mean the back brake's? Woow did'n't know the master cilinder and booster needed to be changed aswell. All the new stuff i need to order in the USA and shipping cost alot. Salvage parts i hope i can buy the right parts here since i don't know how the parts look and the guy doesn't always know which year precisly they came off from. I Think I am going to wait a bit more longer with the disc brake conversion then. First need to finish the F100 and have new APK on the cadillac after that i will take a look @ it again. Want to thank you alot for the trouble EZ and other members!
The drum brake wheels (original 1965-66 Cadillac) will not clear the disc brake rotors and calipers. The drum brake wheels have a funky off-set. You must use wheels from a 1969 or later Cadillac that came with disc brakes from the factory. They will have the correct clearance. Of course just about any aftermarket wheels will also work too. Understand?
And to answer your other question, yes, you must change the master cylinder. The stock M/C is set up for drum brakes. So you must change to a disc/drum master cylinder from a 1969 or later Cadillac or Chevrolet. I used a Corvette 7" double diaphram booster and M/C on my car. The booster bolted right up but I have to modify the clevis on the end of the rod so it'll attach to the brake pedal.
Thnx yea i understand now i read it wrong but understand now. Ooh ok like that yea make's much sense. Thnx for your list off things needed for disc brake conversion off the front wheels. How much without the wheels would the total conversion cost? And do you want to help me or any other member off this forum with the parts.
The parts from the salvage yard: I contacted the guy here in the netherlands but he needs to see the old parts before you can search for it...
And new parts cost alot off money if i need to buy them here.
Maybe some one is willing to put it all together for me (A) offcourse i will pay you what it will cost + shipping cost and stuff just let me know!!
Grtz Martijn from the netherlands
Sorry Martijn, I'm not going to be much help. I don't have much access to a junk yard for the parts needed. Maybe Jeff@WillingtonCadillac.com can help you? He runs a cadillac parts business. I bet he can find you the disc brake brackets you need. Everything else is just new parts for a 1969-1972 Cadillac from the Auto Parts store.
Send me your email addy or email me on email@example.com and I'll send u the idler photos
Would you mind sending me the photo's as well? Please send to firstname.lastname@example.org
Hey Pete and EZ,
Allready send Pete my email and got the picture's!
I just send an email to Jeff for the parts and some other stuff hope he got the parts and for a good price