69 disc brakes
 

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

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.

Yup, 69 -70 front spindles. And yes, I think it will hard and expensive to find rotors. Believe Scarebird has a kit?

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.

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.

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.

CPR sells rotors for the '67/'68 cars. Not cheap!

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

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.

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.

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.

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

Kore3 hubs

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.

Buy my 70 bonneville lol.or maybe will be parting it out sometime. Has 3.23 posi and 455 ho in it