Started the install of the rear discs(65, 12 bolt ). Got the kit from CPP. I am unsure about how the brackets go on. Searched the threads, re-read my instructions. What holes does the bracket use? Would love to see some pictures of this. If the bracket is placed on the trailing end of the axle tube, one of the bolt holes is blocked by the lca bracket. Wish the instructions came w/ pics!!

I just did a rear disc conversion kit on my '66 with a 12 bolt. I got my kit from Matt's classic Bowties. I'm not sure how different they are from CPP's but it sure looks the same. I will send you some pix of mine installed. I'll try to post them when I get home from work.

I have the CPP rear 12 inch kit on my 66 and I have to say it was an interesting process. The caliper will be to the rear of the car and will only go on 1 way on each side. I had a heck of a time with it. I can send you pics if you like and answer any questions you have. I am a dealer for CPP and I have talked to them in detail about the kit as to how they can improve the set up.

I have to be at work tomorrow at 1 pm Vegas time so I will take some pics in the morning for you so you can see how they go.

I sent you a PM with my phone number so youc an call me if you want some quick answers before I go to work.

Let me know,

Greg

I hope these help.

Here's another pix to show the lower bolt that holds the caliper bracket to the axle tube flange. It comes close but it does not hit the LCA bracket. If it's too hard to see I will pull a wheel off and take some better pix. Please excuse all the surface rust on the rotors...haven't driven the car yet this year. As you will see, I replaced the stock lower control arms with new ones from UMI performance. Got their adjustable uppers too.

Here are some pics of my 12 bolt rear. This is the drivers side, attempting to mount the caliper brackets on the inner side of the axle flange as per the instructions included from CPP. The lower bolt hits the LCA mounting bracket. Anybody else used CPP for a rear disc setup on a 12 bolt?

I just put on the same exact setup about a month ago, I just cut off both of the lower bolts about 1/4" with my sawzall and called it good....ruined a good sawzall blade though in the process as the bolts look be be grade 8 or so. Clean up the bolt threads before the install, and bolt the bracket on. Word of advice, put the e-brake cables on the calipers first as they can be a pain, after you paint the calipers if you choose to do so. Also, be careful of the bracket threads, I had a little bit of an issue getting the lower bolt straight in the hole...and have fun holding the brake pad in place while you put the bolts in:cool:. Kit could be better engineered, but I got mine at a discount, so I can't complain too much.

Thanks Mike. I am sending these pics to CPP also. "They have never heard of anyone having a problem like this before" according to them. I find that a little hard to believe. Thanks for posting, as this has been confusing the heck out of me!!

I did a cpp install as well. I had to cut the lower bolt as well. The 3 supplied bolts
were all the same length. This a no go on the lower for sure. I did the front and the back
brakes and it was a pia. The copper washer to banjo bolts kept leaking so I had to grind 3 of the calipers smooth so the copper washers bolt flush for a tight seal. I kind of talked to one of heir techs about it.Supposedly was all new to him or rare that this happens.
Quality control needs to be addressed!

Mine wasn't a CPP kit but it installs basically the same. It bolted up perfectly without any need to modify anything. Everything lined up beautifully.

Visit my wagon website listed in my signature line if you want to see more about the chassis build including these rear discs.

Picture of Bolt hitting LCA of CPP disc brake bracket.

Those bolts are simply too long. Any amount of threads sticking out beyond the nut is just wasted bolt length. Perhaps CPP should include slightly different hardware with their kits. The bolts on my kit (see the photo above) have just a thread or two sticking out beyond the nylock nut and they all fit without a hitch and all the holes in the brackets lined up perfectly requiring absolutely no modifications to anything on my part.

Rich ,
your right the bolts are too long.
The other problem is the caliper castings are too rough on the banjo flares hooking up to the hose. I had to dremel them smooth so the copper washer could get a tight seal.
I spend 3 hours xtra just to make it right. All in all the kit works but you have to grind and cut to make it work.
Fritz

My kit is based on Cadillac rear discs and uses GM discs and calipers. I suspect the supplied rotors are aftermarket but the calipers are reconditioned GM units and fit great. Hopefully they also work great when I get the car on the road. I also like that the parking brakes are built in and the supplied rear cables make integrating them into an otherwise basically stock chassis pretty easy.

What kind of calipers are included in the CPP kit? Are they based on a stock component or are they a one-off aftermarket component?

At some point in the future I'd like to upgrade my calipers to aftermarket ones, perhaps after I actually get the car on the road! However, I don't know if any aftermarket company makes a direct replacement for these Cadillac calipers. I'm sure they make direct replacements for the stock a-body fronts though.

They are the cadillac calliper set up.
They are from centric brake parts.
Looks like remanufactured.

Well I may have some closure on this topic. I called CPP today, after sending one of their tech reps the same pictures I posted above. The tech rep got with one of the "engineers" and concluded that the supplied bolt for the bottom hole will not work, it is too long. They are miffed because they have sold "thousands" of these kits and I am the first one to report a problem. They are going to send me some shorter bolts. I guess that will come in handy if I botch mine up cutting them! I would just like to know how they are passing this 'Kit" off when it doesn't work as advertised. Too bad that an experience like this usually scares me away from doing business with them ever again. Thanks to all who posted on this topic, you all were much more help than the CPP folks were, and quicker.

is this the big brake kit, or the smaller kit? im ordering the big brake front and rear kits tomorrow. i know it should come with the correct bolt, but why not just buy the correct bolt? seems a whole lot easier than cutting a bolt and having to worry about getting it perfect.

also, i went in and talked to them yesterday about the cadillac caliper issue. they are fully aware of it and looking to make a change. the big brake kit uses a lincoln caliper and there is no issue.

Cutting the bolt with a sawzall IS EASIER than going and buying a shorter bolt.....unless cutting a bolt is beyond your ability? I haven't pressurized the brake lines yet, so I don't know if my hose to caliper surface is suspect yet....:cool: