got 5 lugs now need brakes???? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

spr85gmc · 01-30-2010, 12:55 AM

like the tittle says I am doing the 5 lug swap outta a 77 c10 on my 66 gmc everything is done (pics soon), but now I need to figure out the brakes. Can you guys point me in the right direction or into a thread which will help me figure this out..? I already got the booster bracket from capain fab and really dont want to spend tons of money being Im a college student on a budget. thanks Israel

62gmc910 · 01-30-2010, 01:03 AM

I think there are some brake links in the FAC sticky in the top box

**Captainfab** · 01-30-2010, 02:04 AM

Can you elaborate a little more on just what part of 'the brakes' you need help with? The booster? the master?

There are booster recommendations in my sale thread for the booster brackets (link in my sig). You should be able to find these in a wrecking yard. For the master cylinder, just get the one for the '77 pickup. A rebuilt one from your local auto parts supply should be pretty reasonable. Use the proportioning valve from the '77 also.

Quote:

Originally Posted by spr85gmc

like the tittle says I am doing the 5 lug swap outta a 77 c10 on my 66 gmc everything is done (pics soon), but now I need to figure out the brakes. Can you guys point me in the right direction or into a thread which will help me figure this out..? I already got the booster bracket from capain fab and really dont want to spend tons of money being Im a college student on a budget. thanks Israel

spr85gmc · 01-30-2010, 12:07 PM

Do I need to run new lines or keep the original ones and just swap out the booster? What needs to be changed out? I read through many threads but every one does it differently ....I just want to make sure I do it right

**DPowers** · 01-30-2010, 12:43 PM

http://67-72chevytrucks.com/vboard/s...ght=disc+brake

**Captainfab** · 01-31-2010, 01:49 AM

You will need to at least run new lines up front to accomodate the proportioning valve and the front disc brakes. Your truck originally had a single reservior master cylinder. Now you need to use a dual reservior master for the disc brakes. If it were me, I would run all new lines front and back. You basically need to plumb the brakes just like on the '77 you got the front suspension from.

Read thru the thread that DPowers posted and let us know if you still have questions.

Malibob · 01-31-2010, 01:56 AM

I used Monte Carlo lines and am still (maybe not a good idea) using the single resivoir manual master cylinder. It stops ok but drags the rear wheels if I stomp on it. The calipers were the main problem for me. I had calipers and discs from 1.25" and 1" rotors, the 1" rotors used the Monte lines but the 1.25" used something else.

I would personally recommend using a master from the same system you had as a donor for the front discs, running the same sized lines front and rear and that should alleviate the need for a proportioning valve. That is my plan anyhow.

Oh, and I am not sure what the link recommends, just read the main lines that pertained. So may be the same!

spr85gmc · 01-31-2010, 02:23 AM

yeah I was pretty sure about running new lines so I may got to Napa and see if they have what i need Im just worried about bendind them. Just to be 100% sure the proportioning valce is the one bolted down to the crossmember correct with the brake line running through it, should i replace it or use the one off the donor?

Malibob · 01-31-2010, 11:21 AM

Quote:

Originally Posted by spr85gmc

yeah I was pretty sure about running new lines so I may got to Napa and see if they have what i need Im just worried about bendind them. Just to be 100% sure the proportioning valce is the one bolted down to the crossmember correct with the brake line running through it, should i replace it or use the one off the donor?

No, that is just a T fitting. there should be 2 on the crossmember currently and one on the rear that goes to the brake hose.

If you run a dual master you will eliminate one of them from the crossmember because you will have a seperate line for the rear. Once you get under the truck and look it will all kind of make sense.

The proportioning valve is usually mounted really close to the master cylinder.

spr85gmc · 01-31-2010, 04:14 PM

thanks malibob.... by chance do you have pics of them the trucks on my lot about 20 minute way so i cant just go out and check it out sure would be better than sittin here on the computer searching like a mad man

Malibob · 01-31-2010, 04:25 PM

http://www.67-72chevytrucks.com/vboa...=1#post3257836

Look at the second post 1st picture. That thing hanging below the master is the proportioning valve.

The T fittings are just a brass T fitting with 3 inlets for brake lines.

**Captainfab** · 02-01-2010, 01:32 AM

On the '73-'87 trucks the proportioning valve is located on the crossmember between the front of the engine and the radiator. You can mount it most anywhere since you're running new lines. When you go to get your new brake lines ask for the new type that are easier to bend and are kink resistant.

If you have access to a '73-'87 truck that has the brake lines and proportioning valve intact, you could try and use those lines and see if you can make them work on your truck. If nothing else the factory line configuration will give you an idea how to run the new lines.

Malibob · 02-01-2010, 09:46 AM

Quote:

Originally Posted by Captainfab

On the '73-'87 trucks the proportioning valve is located on the crossmember between the front of the engine and the radiator. You can mount it most anywhere since you're running new lines. When you go to get your new brake lines ask for the new type that are easier to bend and are kink resistant.

If you have access to a '73-'87 truck that has the brake lines and proportioning valve intact, you could try and use those lines and see if you can make them work on your truck. If nothing else the factory line configuration will give you an idea how to run the new lines.

Apparently I was mistaken. Sorry

Tx Firefighter · 02-01-2010, 06:02 PM

I used the lines, master cylinder, prop valve, hoses, everything from my 80 model donor. The lines fit perfectly into the older truck. The master cylinder bolted directly to the firewall, even the two large holes for the front brake hoses were already in the frame rails.

I installed it all into place then drill two 5/16 holes to bolt the prop valve to the front most crossmember. What you are seeing here are all unmodified 80 model lines. When you bolt all the lines in place, the prop valve will be resting snug against the front most corssmember beneath the radiator. Just drill two holes and bolt it to the crossmember.

I even used late model 3/16 brake line from the donor back to the rear of the truck and used a 73-87 rear hose too.

01-30-2010, 12:55 AM	#1
spr85gmc Registered User Join Date: Jul 2007 Location: san antonio Posts: 648	got 5 lugs now need brakes???? like the tittle says I am doing the 5 lug swap outta a 77 c10 on my 66 gmc everything is done (pics soon), but now I need to figure out the brakes. Can you guys point me in the right direction or into a thread which will help me figure this out..? I already got the booster bracket from capain fab and really dont want to spend tons of money being Im a college student on a budget. thanks Israel

01-30-2010, 01:03 AM	#2
62gmc910 Registered User Join Date: Nov 2009 Location: Cremona AB Canada Posts: 370	Re: got 5 lugs now need brakes???? I think there are some brake links in the FAC sticky in the top box __________________ 62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck) Last edited by 62gmc910; 01-30-2010 at 01:04 AM. Reason: sp

01-30-2010, 12:07 PM	#4
spr85gmc Registered User Join Date: Jul 2007 Location: san antonio Posts: 648	Re: got 5 lugs now need brakes???? Do I need to run new lines or keep the original ones and just swap out the booster? What needs to be changed out? I read through many threads but every one does it differently ....I just want to make sure I do it right

01-30-2010, 12:43 PM	#5
DPowers One foot in front of the other Join Date: Aug 2008 Location: Parrottsville, TN Posts: 5,440	Re: got 5 lugs now need brakes???? http://67-72chevytrucks.com/vboard/s...ght=disc+brake

01-31-2010, 01:49 AM	#6
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: got 5 lugs now need brakes???? You will need to at least run new lines up front to accomodate the proportioning valve and the front disc brakes. Your truck originally had a single reservior master cylinder. Now you need to use a dual reservior master for the disc brakes. If it were me, I would run all new lines front and back. You basically need to plumb the brakes just like on the '77 you got the front suspension from. Read thru the thread that DPowers posted and let us know if you still have questions. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE Last edited by Captainfab; 01-31-2010 at 01:50 AM.

01-31-2010, 01:56 AM	#7
Malibob Registered User Join Date: May 2009 Location: Pittsburgh Posts: 392	Re: got 5 lugs now need brakes???? I used Monte Carlo lines and am still (maybe not a good idea) using the single resivoir manual master cylinder. It stops ok but drags the rear wheels if I stomp on it. The calipers were the main problem for me. I had calipers and discs from 1.25" and 1" rotors, the 1" rotors used the Monte lines but the 1.25" used something else. I would personally recommend using a master from the same system you had as a donor for the front discs, running the same sized lines front and rear and that should alleviate the need for a proportioning valve. That is my plan anyhow. Oh, and I am not sure what the link recommends, just read the main lines that pertained. So may be the same! __________________ This statement was made possible by a grant from this station and continued support from viewers like you. Flickr Last edited by Malibob; 01-31-2010 at 01:57 AM.

01-31-2010, 02:23 AM	#8
spr85gmc Registered User Join Date: Jul 2007 Location: san antonio Posts: 648	Re: got 5 lugs now need brakes???? yeah I was pretty sure about running new lines so I may got to Napa and see if they have what i need Im just worried about bendind them. Just to be 100% sure the proportioning valce is the one bolted down to the crossmember correct with the brake line running through it, should i replace it or use the one off the donor?

01-31-2010, 04:14 PM	#10
spr85gmc Registered User Join Date: Jul 2007 Location: san antonio Posts: 648	Re: got 5 lugs now need brakes???? thanks malibob.... by chance do you have pics of them the trucks on my lot about 20 minute way so i cant just go out and check it out sure would be better than sittin here on the computer searching like a mad man

01-31-2010, 04:25 PM	#11
Malibob Registered User Join Date: May 2009 Location: Pittsburgh Posts: 392	Re: got 5 lugs now need brakes???? http://www.67-72chevytrucks.com/vboa...=1#post3257836 Look at the second post 1st picture. That thing hanging below the master is the proportioning valve. The T fittings are just a brass T fitting with 3 inlets for brake lines. __________________ This statement was made possible by a grant from this station and continued support from viewers like you. Flickr

02-01-2010, 01:32 AM	#12
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: got 5 lugs now need brakes???? On the '73-'87 trucks the proportioning valve is located on the crossmember between the front of the engine and the radiator. You can mount it most anywhere since you're running new lines. When you go to get your new brake lines ask for the new type that are easier to bend and are kink resistant. If you have access to a '73-'87 truck that has the brake lines and proportioning valve intact, you could try and use those lines and see if you can make them work on your truck. If nothing else the factory line configuration will give you an idea how to run the new lines. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

02-01-2010, 06:02 PM	#14
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: got 5 lugs now need brakes???? I used the lines, master cylinder, prop valve, hoses, everything from my 80 model donor. The lines fit perfectly into the older truck. The master cylinder bolted directly to the firewall, even the two large holes for the front brake hoses were already in the frame rails. I installed it all into place then drill two 5/16 holes to bolt the prop valve to the front most crossmember. What you are seeing here are all unmodified 80 model lines. When you bolt all the lines in place, the prop valve will be resting snug against the front most corssmember beneath the radiator. Just drill two holes and bolt it to the crossmember. I even used late model 3/16 brake line from the donor back to the rear of the truck and used a 73-87 rear hose too. __________________ I'm on the Instagram- @Gearhead_Kevin Last edited by Tx Firefighter; 02-01-2010 at 06:04 PM.



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