Thread: Break Conversion for 67 GTO?

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I have converted my front drum brakes to disc breaks.
I got everything off a 72 Gran Prix.
I put new calipers, porportioning valve,master cylinder.
I changed everything except the power brake booster.
The brake pedal is still at the floor. I bled the brakes and fluid comes out. It doeant seem like there is any air in it. The brake light is on.

Does anyone have any ideas what I might have overlooked?

Thanks, Bob

Question #1: did you buy a disc/drum master cylinder OR did you buy a drum/drum master cylinder? Discs dont like drum master cylinders.

Question #2: Did you bench bleed the master cylinder?...this means that you bled the cylinder before the tubes were hooked to it....preferably on the bench so you dont get juice on your car.

Question #1: did you buy a disc/drum master cylinder OR did you buy a drum/drum master cylinder? Discs dont like drum master cylinders.

Question #2: Did you bench bleed the master cylinder?...this means that you bled the cylinder before the tubes were hooked to it....preferably on the bench so you dont get juice on your car.


---I bought a disc/drum master cylinder
---I did bench bleed the master cylinder


The spindles were used off the gran prix, everything else I bought new for a 72 gran prix.

Should I buy a new power break booster also? The one I am using is for the origional drum breaks.

Thanks again for any help, Bob