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Old 03-24-2020, 01:46 PM
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Default 69 disc brakes

I know a guy who wants to put front disc brakes on his 69 Cat.
What are his options ?

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Old 03-24-2020, 01:59 PM
'ol Pinion head 'ol Pinion head is offline
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Single piston caliper late '68 -70 Pontiac B series disc spindles/calipers/rotors are out there, not sure what the availability of new rotors is for them today.

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Old 03-24-2020, 03:25 PM
rustyrelic rustyrelic is offline
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Yup, 69 -70 front spindles. And yes, I think it will hard and expensive to find rotors. Believe Scarebird has a kit?

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Old 03-24-2020, 03:26 PM
rustyrelic rustyrelic is offline
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Yup, 69 -70 front spindles. And yes, I think it will hard and expensive to find rotors. Master cylinder for the 69-70 disk car. Believe Scarebird has a kit? I think I should have also installed a residual valve as when I finished, it seems like the rear gets too much whoa as compared to the front.

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Old 03-24-2020, 08:51 PM
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sorry -we do not anymore.

They were extremely slow sellers and required different components than the earlier kits.

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Old 03-24-2020, 09:54 PM
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Check with Master Power. I believe they have a kit that will work. It's pricey($1800) and requires the use of 17" wheels. OE rotors and calipers are still available through RockAuto(Raybestos parts). He might want contact Steve Snyder @ CO Pontiacs, Frank's Pontiac Parts or Steve Barrack(Pontiac Heaven) to see if either of them have a '69 or '70 with the complete system still in place.

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Last edited by hurryinhoosier62; 03-24-2020 at 10:03 PM.
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Old 03-25-2020, 10:51 AM
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Quote:
Originally Posted by hurryinhoosier62 View Post
OE rotors and calipers are still available through RockAuto(Raybestos parts).
The parts stores all list rotors available, but if you check the part number they give you it's a 4.75 on 5 bolt pattern and not correct for these cars. No one is making the original rotors that fit these cars to my knowledge.

Best thing you can hope for is finding a late '68-70 B body with disc brakes in good shape that is getting parted or junked.

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Old 03-25-2020, 11:13 AM
mr67gp mr67gp is offline
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CPR sells rotors for the '67/'68 cars. Not cheap!

https://www.ebay.com/itm/1967-1968-P...P/264395338506

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Old 03-25-2020, 01:58 PM
hurryinhoosier62 hurryinhoosier62 is offline
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Quote:
Originally Posted by Ben M. View Post
The parts stores all list rotors available, but if you check the part number they give you it's a 4.75 on 5 bolt pattern and not correct for these cars. No one is making the original rotors that fit these cars to my knowledge.

Best thing you can hope for is finding a late '68-70 B body with disc brakes in good shape that is getting parted or junked.
Every source I’ve looked up lists two different wheel lug bolt patterns for ‘67-‘70 “B” bodies: 5 X 5 (like my ‘64 Catalina) and 5 X 120.7mm(5 X 4.75). One more case of measuring before buying.

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Old 03-25-2020, 04:08 PM
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I am so glad I bought a couple NOS rotors years ago when they were still available and not ridiculously expensive for my 70 Bonneville.

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Old 03-25-2020, 05:13 PM
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Quote:
Originally Posted by hurryinhoosier62 View Post
Every source I’ve looked up lists two different wheel lug bolt patterns for ‘67-‘70 “B” bodies: 5 X 5 (like my ‘64 Catalina) and 5 X 120.7mm(5 X 4.75).
While I'm sure you are correct that the sources say that, I have never seen a 1967-1976 B-body with anything other than 5 on 5 bolt pattern. The application listing in many cases lists the wagon version as the 4.75 on 5, which I know should be wrong having owned a half dozen over the years. I did this conversion myself 15 years ago and back then the 4.75 on 5 was NOT listed as a viable source by any of the old books or computers. The bearing sizes between the two are not interchangeable to fit the smaller bolt pattern rotor on the spindle of a big car (I tried both a '70-81 F-body and a '71 A-body).

In 1977+ I know the 4.75" on 5 bolt pattern was the standard and only heavy duty suspension cars got 5" on 5, making finding brakes for them an exercise in fun.

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Old 03-25-2020, 07:56 PM
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Quote:
Originally Posted by Ben M. View Post
While I'm sure you are correct that the sources say that, I have never seen a 1967-1976 B-body with anything other than 5 on 5 bolt pattern. The application listing in many cases lists the wagon version as the 4.75 on 5, which I know should be wrong having owned a half dozen over the years. I did this conversion myself 15 years ago and back then the 4.75 on 5 was NOT listed as a viable source by any of the old books or computers. The bearing sizes between the two are not interchangeable to fit the smaller bolt pattern rotor on the spindle of a big car (I tried both a '70-81 F-body and a '71 A-body).

In 1977+ I know the 4.75" on 5 bolt pattern was the standard and only heavy duty suspension cars got 5" on 5, making finding brakes for them an exercise in fun.
I had a conversation with Nunzi maybe 15 years ago before disc brake conversion kits became available for the ‘61-‘64 “B” bodies. If I remember correctly Nunz said that to convert a ‘64 to disc brakes you had to use a ‘70 “B” disc brake setup. because it used the 5 X 5 (5 X 127mm these days) bolt pattern. I do remember he was VERY specific about the donor being a ‘70.

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Old 03-25-2020, 10:20 PM
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i dont really think 400 for a pair of rotors is expensive...the ones from CPR

i paid $278 a piece for my CTS-V to put it in perspective

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Old 03-26-2020, 06:50 AM
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Kore3 hubs

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Old 03-26-2020, 11:38 AM
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Quote:
Originally Posted by marxjunk View Post
i dont really think 400 for a pair of rotors is expensive...the ones from CPR

i paid $278 a piece for my CTS-V to put it in perspective
I actually agree! Compared to the cheap $50 chinesium rotors on ebay, I would gladly pay for NOS rotors. Luckily I also stockpiled a bunch years ago when I found a stash for sale from a closed parts house in NE PA.

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Old 04-04-2020, 06:56 PM
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Buy my 70 bonneville lol.or maybe will be parting it out sometime. Has 3.23 posi and 455 ho in it

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