Re: D52 Caliper Rear Disc Brake Brackets
 

I've been cruising Autozone checking for parts and I'm a little confused. I keep reading the d52's are on 71-87 trucks but the parts differ on AZ's website. I did run across a note on the 84' calipers that says it is for J5 brake system. Is this what we would use?
http://www.autozone.com/autozone/par...vice=234655186

Or will the ones they show for my truck work, I have a 78?

Re: D52 Caliper Rear Disc Brake Brackets
 

That Autozone link does not specify which thickness rotor that caliper is for. An '84 could have either the 1" thick rotors or the 1.25" thick rotors. I'm pretty sure the '78 only came with a 1.25" thick rotor. You want the D52 caliper for a 1.25" thick rotor. One way to ID a D52 caliper is that the center to center of the slide bolts is aprox 7" and typically has a 2-15/16" diameter piston. The JB/JD7 calipers have a 3-5/32" diameter piston.

Re: D52 Caliper Rear Disc Brake Brackets
 

So 78 should be a d52, correct?

Re: D52 Caliper Rear Disc Brake Brackets
 

Yes. All '71-'87 C/K series use the D52 calipers. But some are for the 1" thick rotor and some are for the 1.25" thick rotor.

Re: D52 Caliper Rear Disc Brake Brackets
 

Thanks Captainfab, I will be ordering a set from you real soon.

Re: D52 Caliper Rear Disc Brake Brackets
 

Do these require a longer wheel stud, or is the rotor hat of similar thickness to the drum?

Re: D52 Caliper Rear Disc Brake Brackets
 

The rotor hat is thicker than a drum. Some guys are running the same wheel studs, and others are changing to a little longer studs. I'd say it depends on what wheels you are running.

Re: D52 Caliper Rear Disc Brake Brackets
 

Captainfab,
I'm gathering parts for this conversion and I am curious what master cylinder too use. Is there an easy way to find an MC that is disc disc that will work on my 78? It looks like I have a 1.125 bore.

Thanks.

Re: D52 Caliper Rear Disc Brake Brackets
 

I believe I got it. I think I am going with this one.


http://www.napaonline.com/Catalog/Ca...BLV_0355990714

Re: D52 Caliper Rear Disc Brake Brackets
 

One of the most common master cylinders to use for a disc/disc conversion is a Corvette master cylinder. You will also need either a disc/disc proportioning valve or an adjustable valve in the rear line.

Re: D52 Caliper Rear Disc Brake Brackets
 

Just be sure it matches your piston- shallow or deep- and you should be good to go. Stock disc/drum combo valve can be gutted for use with disc/disc...
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Re: D52 Caliper Rear Disc Brake Brackets
 

Cool. I was going to pick up the prop valve you have suggested. Thanks for all the help Capt. I will be ordering real soon, probably within the next week.

Re: D52 Caliper Rear Disc Brake Brackets
 

Received my brackets the other day--they look great! Well packaged and BEEFY. Gonna look great in satin black powder.

Thanks again!

Also, if anyone is looking for a set of rotors for this swap, I have some for sale cheap here:
LA Premium Rotors for CaptainFab D52 Rear Discs

Re: D52 Caliper Rear Disc Brake Brackets
 

That's a smokin' deal on those rotors.......

Re: D52 Caliper Rear Disc Brake Brackets
 

Hey Capt, Would it be possible to use a line-loc unit as a parking brake with the either caliper? I would think you could, any thoughts..

Re: D52 Caliper Rear Disc Brake Brackets
 

Using a line lock or a Mico lock has been done many times. It does work but it is not legal in those states that require an e-brake. It has to be a mechanical e-brake to be legal.

Re: D52 Caliper Rear Disc Brake Brackets
 

Re: D52 Caliper Rear Disc Brake Brackets
 

How about a complete drum to disc conversion kit for my 72 c10 rears? Got em? Price? Thanks
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Re: D52 Caliper Rear Disc Brake Brackets
 

I have never sold a complete conversion, just the brackets. It just seems pointless to be to pay the shipping on the rotors and calipers, etc. which are heavy, when you can just take the parts list down to your local auto parts store and pick them up.

Re: D52 Caliper Rear Disc Brake Brackets
 

just found this thread, read it all, yeah imma need a set of these bad boys!

Re: D52 Caliper Rear Disc Brake Brackets
 

PM sent.....

Re: D52 Caliper Rear Disc Brake Brackets
 

capt I'm running 15" ralley rims 15x10 4.5 backspacing will your bracket work for me.

Re: D52 Caliper Rear Disc Brake Brackets
 

The 15 x 8 Ralley wheels will fit, so I would assume that your 15 x 10's would also.

Re: D52 Caliper Rear Disc Brake Brackets
 

Do these fit a 79 c10 10 bolt ?

Re: D52 Caliper Rear Disc Brake Brackets
 

Yes, these will fit all truck 12 bolts from '64-'82 and the truck 10 bolts from '80-'87

Re: D52 Caliper Rear Disc Brake Brackets
 

Do you make plates for a 63 c10 5 lug conversion?
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Re: D52 Caliper Rear Disc Brake Brackets
 

Any of my 3, 5 lug rear disc brake brackets will work with the 5 lug conversions on the original 6 lug differentials. However if your '63 has the original 12 bolt, they will not work for you. This is because the '63 12 bolts have pressed on backing plates. Therefore there is not a flange welded to the axle tube that the backing plate bolts to. The best option for disc brakes on a '63 12 bolt will be a weld on caliper bracket.

Re: D52 Caliper Rear Disc Brake Brackets
 

Sorry I forgot prices were on first page of thread.
I want to send a money order.
Can you send me the info on where to send?
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Re: D52 Caliper Rear Disc Brake Brackets
 

PM coming your way......

Re: D52 Caliper Rear Disc Brake Brackets
 

just out of curiosity i dont know anything about the cadillacs but if the rear calipers work would the rotors not work as well since they should be the same thickness as the astro rotors or would there be a back space issue since its a car? what about the master cylinder as well since it should be a disc/disc setup

sorry not trying to pick your brain just trying to see if theres more options

Re: D52 Caliper Rear Disc Brake Brackets
 

Yes the Eldorado rotors could have been used when designing these brackets, but I was wanting to use a rotor that could be found in a wrecking yard. The Astro/Safari vans are fairly plentiful in the wrecking yards. The '76-'79 Eldorado's are not. I know that new rotors are not that expensive, but sometimes a guy needs to be resourceful. Also the long term availability of the Eldorado rotors may be hard to predict. The Astro/Safari rotors are slightly larger in diameter than the Eldorado rotors.

The Eldorado master cylinder should work just fine with most GM boosters. If you happen to find an Eldorado in a wrecking yard, grab the proportioning valve also.

Re: D52 Caliper Rear Disc Brake Brackets
 

I picked up all the Eldo parts at PullAPart but have been holding off because I want to retain my 6-bolt pattern. A bore and sleeve at White Horse and they'll be better than new.

Re: D52 Caliper Rear Disc Brake Brackets
 

captanifab,
Are these still avalaiable?

True

Re: D52 Caliper Rear Disc Brake Brackets
 

Yes they are......in fact I just got another order of laser and plasma cut parts for them earlier this week.

Re: D52 Caliper Rear Disc Brake Brackets
 

Was there ever a solution to the pad rubbing the rotor hat issue? Mine are scoring pretty hard...

Re: D52 Caliper Rear Disc Brake Brackets
 

I received your payment today. I will get those shipped out on Monday.

You do realize that the D52's are the only caliper that will bolt up to these brackets, right?

Re: D52 Caliper Rear Disc Brake Brackets
 

I have not had that issue with what I have mocked up here. One other customer has had that issue, but he has not gotten back to me with the measurement I need to determine what needs to be done to correct the situation. I don't want to just move the caliper out farther, and have the pads hanging past the outer edge of the rotor, if I don't have to. I just need someone to help me out with the measurement I need.

Re: D52 Caliper Rear Disc Brake Brackets
 

Let me know what you need and I'll try to get it for you
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Re: D52 Caliper Rear Disc Brake Brackets
 

I don't have a pic of the dimension I need, on this computer. I will get it from my shop computer tomorrow and post it here.