Brakes ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

OL BLUE · 12-02-2004, 11:43 PM

im sure this is a repost but, when i start on my truck id like to add disc brakes. i dont wanna spend big bux on aftermarket stuff. i just wanna know what fits from other years trucks or whatever i can find at the boneyard. ive got a 67 c20. i know some of the 71-72s had discs but they are gettin hard to find in salvage yards. will 73-up parts work? what years and what all will i have to pull from the donor truck? thanks in advance for any help you can offer.

Brainchild · 12-03-2004, 12:14 AM

Welcome to the boards

You'll have to have the spindles,and tierod ends.All the brake componets,lines,calipers.

Plus you'll need some adapters to male the two tierods mate up,one is a different size.Some one here can tell you where to get those.

bluec10 · 12-03-2004, 12:19 AM

You have several options:

1. Find a 71-71 C-20 at the wrecker that has disc brakes. You can keep the same ball joints - simply swap in the 71-72 spindles and find a mc/booster/proportioning valve for disc brakes.

2. Using later components is also possible, but a bit more work. What I'm doing is replacing the entire front crossmember in my '69 with a crossmember from an '84. In my case the entire crossmenber just swaps in and only two new holes need to be drilled. Perfect fit. You'll still need to get a mc/booster/proportioning valve set that works for disc brakes.

Have fun.

OL BLUE · 12-07-2004, 12:26 AM

so the 73-up parts will work? do i have to change out the whole crossmember? or will the spindles just swap out? i know ill need a new ms and prop valve and all. i just need to know what will work for sure on the spindles and discs.

GMC3 · 12-07-2004, 12:55 AM

the spindles will fit, just use the 73- up ball joints, they fit right into the older a-arms. If i'm not mistaken, when doing it this way you will lose a little bit in the turning radius, but it will work

68w/sbc406 · 12-07-2004, 01:59 AM

you can grind off the steering stops and get the radius back. some people say that the easiest way is just change the cross member, but to do it right you still have to take it apart and put new tie rods and ball joints in. you can bay a whole conversion kit from some of the board venders on the front page, or go to the junk yard and scrounge up the parts you need. what ever you do if you go to a yard, make sure that you remember the year of the truck that way you can buy the tie rods and ball joints for that year

12-02-2004, 11:43 PM	#1
OL BLUE Registered User Join Date: Nov 2004 Location: INDIANA Posts: 44	Brakes ? im sure this is a repost but, when i start on my truck id like to add disc brakes. i dont wanna spend big bux on aftermarket stuff. i just wanna know what fits from other years trucks or whatever i can find at the boneyard. ive got a 67 c20. i know some of the 71-72s had discs but they are gettin hard to find in salvage yards. will 73-up parts work? what years and what all will i have to pull from the donor truck? thanks in advance for any help you can offer. __________________ current projects: 67 c20 w/350 4spd 74 camaro 355/th400 83 malibu wagon 80 malibu wagon

12-03-2004, 12:14 AM	#2
Brainchild Still drivin' a Rat Rod Join Date: Sep 2004 Location: Monett Missouri Posts: 4,925	Welcome to the boards You'll have to have the spindles,and tierod ends.All the brake componets,lines,calipers. Plus you'll need some adapters to male the two tierods mate up,one is a different size.Some one here can tell you where to get those. __________________ Rusty Member #13872 Instead of saying.....you are a discomfort in the back of my front.....one should be able to say...... you are a pain in the a$# 71 GMC LWB 49 Chevy 85 Chevy G20 Check out my website

12-03-2004, 12:19 AM	#3
bluec10 Registered User Join Date: Apr 2002 Location: Manitoba, Canada Posts: 663	You have several options: 1. Find a 71-71 C-20 at the wrecker that has disc brakes. You can keep the same ball joints - simply swap in the 71-72 spindles and find a mc/booster/proportioning valve for disc brakes. 2. Using later components is also possible, but a bit more work. What I'm doing is replacing the entire front crossmember in my '69 with a crossmember from an '84. In my case the entire crossmenber just swaps in and only two new holes need to be drilled. Perfect fit. You'll still need to get a mc/booster/proportioning valve set that works for disc brakes. Have fun. __________________ Present: 2015 Tacoma. Yeah, not a GM, but I love it. 1969 GMC 32,000 - fix, drive, relax, fix... 2019 BMW R1250 GSA - Yahoooooooo 1979 Honda GL 1000 - retro touring at its best. Past: '05 Sierra 4x4 - Had 270,000 KM and running well when it was written-off by a stop sign runner. '94 F-150 from the "F word" company. I'll admit it...good truck. Sold what was left of it for $800 to a guy who came to pick it up at 11:00 PM with cash in hand. Hmm. '79 Sierra Grande (Black) organ donor - perfect rebuildable 4-bolt 350 and a good TH350. '76 Sierra Grande (Orange) - hate isn't too strong a word. Kid who bought it turned it into a hot rod. '68 C-10 R.I.P. - Dad's old truck...too far gone to resurrect. '59 C-50 - with hoist. Truck is gone, wife isn't. Nuff said.

12-07-2004, 12:26 AM	#4
OL BLUE Registered User Join Date: Nov 2004 Location: INDIANA Posts: 44	so the 73-up parts will work? do i have to change out the whole crossmember? or will the spindles just swap out? i know ill need a new ms and prop valve and all. i just need to know what will work for sure on the spindles and discs. __________________ current projects: 67 c20 w/350 4spd 74 camaro 355/th400 83 malibu wagon 80 malibu wagon

12-07-2004, 01:59 AM	#6
68w/sbc406 Got Light Emitting Diode? Join Date: Apr 2004 Location: Newberg, OR Posts: 2,485	you can grind off the steering stops and get the radius back. some people say that the easiest way is just change the cross member, but to do it right you still have to take it apart and put new tie rods and ball joints in. you can bay a whole conversion kit from some of the board venders on the front page, or go to the junk yard and scrounge up the parts you need. what ever you do if you go to a yard, make sure that you remember the year of the truck that way you can buy the tie rods and ball joints for that year __________________ 1968 1/2 ton 2wd lwb 6 lug disc and bags up front. Next c notch and rear bags '02 Chevy Silverado LT ext cab short bed 2WD 5/7 drop on 22's(the family car) 1993 Cherokee work ride/weekend wheeler

12-07-2004, 12:55 AM	#5
GMC3 Registered User Join Date: Aug 2002 Location: philadelphia Posts: 62	the spindles will fit, just use the 73- up ball joints, they fit right into the older a-arms. If i'm not mistaken, when doing it this way you will lose a little bit in the turning radius, but it will work



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