Power brake booster question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ED67C20 · 10-05-2008, 06:33 PM

How much difference is there in the brake boosters? I want to convert my 67 C20 with drums all around to power brakes. I found a complete power brake setup at a junkyard from a disc brake C20. Is this not a good booster to use? Should I use a C20 drum brake booster only? I have pretty much figured out the interchange info from the NAPA autoparts website. About the time I buy a new booster I will find a C20 parts truck with disc brakes. The junkyard crushed the rest of that truck, I want to convert to front disc someday, but you know the whole time and money thing.

Longhorn Man · 10-05-2008, 07:16 PM

I tried putting a disk booster on my drum truck a few years ago. I can't remember why now... but I was unable to do it.

**Palf70Step** · 10-05-2008, 07:33 PM

If you are staying with all drums and just adding power, you will need the booster, mounting bracket and the rod to hook the booster to the pedal. You'll need to bend or move the lines from the line block down to the wheels, and you may not even need a new Master Cylinder to bolt to the booster.

Oh yeah, you'll need the hoses and valve hicky (forgot their real name) to hook it up to an engine vacuum.

The C20 Booster give you more pressure and since yours is a C20 I would not go with the smaller 1/2 ton booster.

ED67C20 · 10-05-2008, 09:57 PM

I guess my main question is can I use a disc brake booster for my drum brakes?

10-05-2008, 06:33 PM	#1
ED67C20 Registered User Join Date: Aug 2006 Location: spokane, washington Posts: 37	Power brake booster question How much difference is there in the brake boosters? I want to convert my 67 C20 with drums all around to power brakes. I found a complete power brake setup at a junkyard from a disc brake C20. Is this not a good booster to use? Should I use a C20 drum brake booster only? I have pretty much figured out the interchange info from the NAPA autoparts website. About the time I buy a new booster I will find a C20 parts truck with disc brakes. The junkyard crushed the rest of that truck, I want to convert to front disc someday, but you know the whole time and money thing.

10-05-2008, 07:16 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Power brake booster question I tried putting a disk booster on my drum truck a few years ago. I can't remember why now... but I was unable to do it.

10-05-2008, 07:33 PM	#3
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,220	Re: Power brake booster question If you are staying with all drums and just adding power, you will need the booster, mounting bracket and the rod to hook the booster to the pedal. You'll need to bend or move the lines from the line block down to the wheels, and you may not even need a new Master Cylinder to bolt to the booster. Oh yeah, you'll need the hoses and valve hicky (forgot their real name) to hook it up to an engine vacuum. The C20 Booster give you more pressure and since yours is a C20 I would not go with the smaller 1/2 ton booster. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! Last edited by Palf70Step; 10-05-2008 at 07:35 PM.

10-05-2008, 09:57 PM	#4
ED67C20 Registered User Join Date: Aug 2006 Location: spokane, washington Posts: 37	Re: Power brake booster question I guess my main question is can I use a disc brake booster for my drum brakes?

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