Disc Brake conversion question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

big d's red67 · 11-25-2011, 08:28 AM

I have searched for this and can't find an answer, I have power drum brakes on my 67 when I switch over to disc's do I need to change the brake lines from the prop valve that run down to the frame?

**lolife99** · 11-25-2011, 09:46 AM

Yes.
Your drum brake truck has a distirbution block.
(not a proportioning valve)
You will need a disc brake proportioning valve and the steel lines will be different.

cdowns · 11-25-2011, 10:38 AM

master cylinder is different too// the rear brake line may be the same but not fronts

big d's red67 · 11-25-2011, 10:48 AM

Do I need to replace all of the front hard lines ?

LowGT · 12-24-2011, 01:18 AM

I'm curious about this as well. I just finished everything for my disc/drum conversion and was disappointed when I figured out the fittings on the distribution block are different from the prop. valve.

Are there different year hard lines that can be used? Can I just use adapters? Do I need to bend/flare my own? Anyone know what size tube/fitting is needed?

11-25-2011, 08:28 AM	#1
big d's red67 Registered User Join Date: May 2010 Location: Broken Arrow Okla. Posts: 510	Disc Brake conversion question I have searched for this and can't find an answer, I have power drum brakes on my 67 when I switch over to disc's do I need to change the brake lines from the prop valve that run down to the frame? __________________ 1967 swb 454 cid 700R4 trans SOLD 2006 Chevy Trailblazer SS 2013 Camaro RS convertible the wife's Build thread http://67-72chevytrucks.com/vboard/s...d.php?t=573248

11-25-2011, 09:46 AM	#2
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,700	Re: Disc Brake conversion question Yes. Your drum brake truck has a distirbution block. (not a proportioning valve) You will need a disc brake proportioning valve and the steel lines will be different. __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823

11-25-2011, 10:38 AM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Disc Brake conversion question master cylinder is different too// the rear brake line may be the same but not fronts __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

11-25-2011, 10:48 AM	#4
big d's red67 Registered User Join Date: May 2010 Location: Broken Arrow Okla. Posts: 510	Re: Disc Brake conversion question Do I need to replace all of the front hard lines ? __________________ 1967 swb 454 cid 700R4 trans SOLD 2006 Chevy Trailblazer SS 2013 Camaro RS convertible the wife's Build thread http://67-72chevytrucks.com/vboard/s...d.php?t=573248

12-24-2011, 01:18 AM	#5
LowGT Registered User Join Date: Aug 2011 Location: Dallas, TX Posts: 95	Re: Disc Brake conversion question I'm curious about this as well. I just finished everything for my disc/drum conversion and was disappointed when I figured out the fittings on the distribution block are different from the prop. valve. Are there different year hard lines that can be used? Can I just use adapters? Do I need to bend/flare my own? Anyone know what size tube/fitting is needed? __________________ 65 SWB BBW - 283, TH400

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