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Mod | | Forums66 Topics126,777 Posts1,039,270 Members48,100 | Most Online2,175 Jul 21st, 2025 | | | Joined: Aug 2023 Posts: 4 Moderated | Moderated Joined: Aug 2023 Posts: 4 | I have a 63 C60 with the typical brake issues with the booster under the cab, but finding a replacement booster is proving to be fruitless. My local NAPA and another local business say they can send mine out to be rebuilt, but with a two month turn around and no guarantees that they will have all the parts needed. I'm considering a build to move a more modern vacuum booster and master cylinder to the fire wall. Does anyone have any info on this being done before? If so, what master cylinder was used? | | | | Joined: Mar 2004 Posts: 6,189 'Bolter | 'Bolter Joined: Mar 2004 Posts: 6,189 | You would need to start looking at 2-ton trucks in the junk yards to find something that would work for you. Do you know your existing Hydrovac is not working? Is there a tag with a model number on the Hydrovac? Master cylinders can be sleeved and rebuilt to better than new (look up White Post Restorations). Mike B  | | | | Joined: Nov 2010 Posts: 430 'Bolter | 'Bolter Joined: Nov 2010 Posts: 430 | BP,
I have been making a conversion kit to run 15" disc and a modern vacuum boosted master for over ten years. I will finally have parts back in stock to send out more kits in about 4 weeks. Total cost with you providing the off the shelf parts ( calipers, rotors, master and booster, etc. ) is about $3,000-3,500. | | | | Joined: Mar 2004 Posts: 6,189 'Bolter | 'Bolter Joined: Mar 2004 Posts: 6,189 | Randy, I didn't know your kits went up into the 60's...that's good to know! Mike B  | | | | Joined: Nov 2010 Posts: 430 'Bolter | 'Bolter Joined: Nov 2010 Posts: 430 | And.... I didn't catch that the truck was in the 60's. I think however that my kit would likely fit on the hubs. Let me know when you get it apart and we can check some things. | | | | Joined: Mar 2007 Posts: 2,985 Crusty Old Sarge | Crusty Old Sarge Joined: Mar 2007 Posts: 2,985 | Try Ed Strain Inc. They rebuild Hydrovac boosters, 1 (888) 266-1623.
~ Craig 1958 Viking 4400"The Book of Thor"Read the story in the DITY1960 Chevrolet C10"A Family Heirloom"Follow the story in the DITY Gallery'59 Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting) Come Bleed or Blister, something has got to give!!! | Living life in the SLOW lane | | | | Joined: Jul 2022 Posts: 90 'Bolter | 'Bolter Joined: Jul 2022 Posts: 90 | I got my hydrovac for my 59 rebuilt by cardone through rock auto. The rest of the system might not work still but the hydrovac does!
59 chevy Spartan 100, former firetruck 348ci with spicer 5 speed and electric rear
| | | | Joined: Aug 2010 Posts: 389 'Bolter | 'Bolter Joined: Aug 2010 Posts: 389 | RDomeck are your kits provided with different spindles, or adapter plates to use the existing ones? I've found a 14.7" medium duty truck disc brake rotor that I believe could be made to work, it's 6 bolt like my current hubs. So, once I had rotors attached then it'd be a matter of adapting some large caliper to it, finding one with the right number and diameter of pistons to make the brake balance work OK. I'm OK with leaving my current, all brand new, Hydrovac system intact because it works fine.
Last edited by Tronman; 09/04/2023 1:05 AM.
1965 C60 school bus | 1967 GMC 6500 school bus
| | | | Joined: Nov 2010 Posts: 430 'Bolter | 'Bolter Joined: Nov 2010 Posts: 430 | Tronman, My kits use your original spindles. You just remove your baking plate and bolt on the caliper bracket. The drum comes off of the hub and you mount my rotor adapter to your hub, then bolt the rotor on. It is a very clean and simple process and one that can be put back to original if you ever wanted to. | | | | Joined: Aug 2010 Posts: 389 'Bolter | 'Bolter Joined: Aug 2010 Posts: 389 | That sounds like a go! Do you offer just the brackets or only as a complete kit? I've seen one aaftermarket option that the catalog says fits my C60, likely because it has the lighter duty 5,000lb axle, but I think it's for a C10 so likely not big enough rotor diameter. I'd rather have a large rotor that never gets very hot and lasts forever versus one that's too small and burns up/warps. I've got some access to local machine shop talent meaning I could have a rotor turned or drilled as needed for the hub pilot and bolt holes to line up. Plus I like a challenge and I'm not in a hurry for this because the current brakes at least work.
1965 C60 school bus | 1967 GMC 6500 school bus
| | | | Joined: May 2015 Posts: 9,830 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 9,830 | Guys, please take the buy/sell discussion to PM.
Thanks
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | | | Joined: Aug 2010 Posts: 389 'Bolter | 'Bolter Joined: Aug 2010 Posts: 389 | My apologies, I wasn't trying to buy it as such, just curious as to what the kit options were. Didn't mean to break the rules.
1965 C60 school bus | 1967 GMC 6500 school bus
| | | | Joined: Sep 2023 Posts: 22 'Bolter | 'Bolter Joined: Sep 2023 Posts: 22 | I have 1948 2 speed rear. Think it’s 10 lug. Just getting started. I don’t know if my drums will be good. The back are supposed to be 15” and the front are 14”. It sounds like you have rotor for a replacement. Do you have more information. | | | | Joined: Nov 2010 Posts: 430 'Bolter | 'Bolter Joined: Nov 2010 Posts: 430 | Hey guys, It sounds like I need to do a proper for sale add for the disc brake kits. I used to have a good thread on the old SB server, but that didn't make it to the new server a few years ago.
I'll have the new parts from the machine shop in about two weeks. I'll get a write up done and an add in the for sale section soon after... | | | | Joined: Sep 2009 Posts: 4,392 Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT | Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT Joined: Sep 2009 Posts: 4,392 | Randy, Just a note that you may want to peek at the somewhat recently updated Swap Meet Guidelines if you haven't been in those forums lately. If you need any help or have questions on posting an ad, drop me a PM and I would be glad to answer and/or help in whatever way I can. 
~ Dan 1951 Chevy 3 window 3100Follow this story in the DITY Gallery"My Grandpa Carl's Truck and How it Became Mine"1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
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