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#1 |
Registered User
Join Date: Mar 2005
Location: Pasadena Area, Ca.
Posts: 33
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K5 6 lug brake upgrade options
Hello, looking to upgrade the front brakes on my '71 K5. There's not too many choices that I have found.
As of now I'm looking at either stock ( new or resurfaced ) rotors and Wilwood D52 style calipers. Or The H3 Hummer swap that I have seen here and there. Any advice one way or another, or any different options out there? Thanks, |
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#2 |
Senior Member
![]() Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,904
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Re: K5 6 lug brake upgrade options
I don't really have any information about upgrades, but the stock setup should give you plenty of stopping power if everything is working correctly.
If I were to do an upgrade, I would consider hydroboost.
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I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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#3 |
Registered User
Join Date: Mar 2007
Location: Oakland, Ca
Posts: 1,382
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Re: K5 6 lug brake upgrade options
I've been eyeballing these brake set ups: https://www.littleshopmfg.com/gm-71-...ake-kit-6-lug/
or this one if you want to run 20" wheels: https://www.littleshopmfg.com/gm-71-...ake-kit-6-lug/ Last edited by SeventyOne; 05-25-2022 at 02:38 PM. |
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#4 |
Registered User
Join Date: Mar 2005
Location: Pasadena Area, Ca.
Posts: 33
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Re: K5 6 lug brake upgrade options
Thanks for the links, I hadn't seen those before. I was hoping to use a 17" wheel, but those 14" rotors are tempting.
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#5 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,376
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Re: K5 6 lug brake upgrade options
Some guys report improved braking with use of a 3/4-1 ton brake booster harvested from a pickup. There are some older threads that outline this swap.
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1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#6 |
Registered User
![]() Join Date: Jan 2016
Location: Hesperia, CA
Posts: 40
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Re: K5 6 lug brake upgrade options
I believe there’s a vendor on here that sells complete booster with master cylinder with 30 or 40% , can’t remember, greater efficiency over stock booster.
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#7 |
Senior Member
![]() Join Date: Dec 1999
Location: Southern California
Posts: 2,804
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Re: K5 6 lug brake upgrade options
If not for the axle change on my truck I would have just done the hydroboost upgrade on my K10. Even with the axle changes I kept the rotors, calipers and brake pads as oem parts available at any parts store. My preference for future service, you and others may see things differently. 57taskforce did a hydroboost mod with stock brakes and stated it one of the best things he has done. A post in my build thread https://67-72chevytrucks.com/vboard/...&postcount=147
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Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 |
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#8 |
Registered User
Join Date: Mar 2007
Location: Oakland, Ca
Posts: 1,382
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Re: K5 6 lug brake upgrade options
I agree - Hydroboost is an excellent upgrade, and most times necessary depending on your camshaft selection on a rebuilt engine.
I have hydro and 4 wheel 3/4 ton discs brakes but still feel like braking could be better and the only way to get better braking from here is larger rotors and calipers. |
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#9 |
Registered User
![]() Join Date: Dec 2013
Location: Henderson, NC
Posts: 75
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Re: K5 6 lug brake upgrade options
My 72 on 33" tires, powered by a hot 383 stroker stops just fine.
Stock front disc calipers with upgraded pads (this makes a difference) Stock rear drums in good working order (I would consider a disc conversion, if starting from scratch) and the real difference maker; a 1 ton brake booster (and don't go the junkyard, go to O'Reilly's or Advance and get a C30 brake booster) |
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#10 | |
Senior Member
![]() Join Date: Jan 2008
Location: Melbourne, Victoria, Australia
Posts: 216
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Re: K5 6 lug brake upgrade options
Quote:
https://www.rockauto.com/en/moreinfo...1884&jsn=10655 |
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#11 |
Registered User
![]() Join Date: Dec 2013
Location: Henderson, NC
Posts: 75
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Re: K5 6 lug brake upgrade options
That's it. 72 1T
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#12 |
Registered User
Join Date: Mar 2008
Location: Concord NC
Posts: 511
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Re: K5 6 lug brake upgrade options
PowerStop has vented rotors and performance pads as stock replacement items.
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#13 |
Registered User
Join Date: Aug 2007
Location: Redwood City, CA
Posts: 1,177
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Re: K5 6 lug brake upgrade options
I recently upgraded my stock 6 lug front disc/caliper setup (running 15x6 steelies) with Wilwood D52 calipers, slotted/drilled 6 lug rotors and stainless braided brake hoses. Yes, it made a noticeable difference with both firmer pedal feel and improved stopping performance over the stock setup.
Slotted/drilled 6 lug rotors: https://www.classicchevy.com/1960-19...-876986-1.html Braided brake hose is available from several different vendors, I went with Inline
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66 GMC Suburban Custom 66 Chevy K10 Suburban |
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