Hydroboost Mounting Plates

[El Campo]

So is the socket necessary to get the hydroboost out of Astro? I havent went to pick mine up yet and was wondering if I needed it to remove it or just to take OEM brackets off of it when it is out? Also does anyone know if I still have the drums on the back can I use the master cylinder from a vehicle that had discs all the way around?

[Captainfab]

No you do not need the socket to remove the unit from the vehicle. Depending on the shape of the factory bracket, you may or may not need the socket to remove the factory mounting bracket. Some of the Astro vans' factory brackets will bolt right up to my booster brackets.

If you have a disc/drum brake system on your truck, you should run a disc/drum master cylinder with the disc/drum proportioning valve.

Originally Posted by El Campo

So is the socket necessary to get the hydroboost out of Astro? I havent went to pick mine up yet and was wondering if I needed it to remove it or just to take OEM brackets off of it when it is out? Also does anyone know if I still have the drums on the back can I use the master cylinder from a vehicle that had discs all the way around?

[bryankichler]

received mine today looks like a good quality product now one of these days when i get home i might get to install this

[Captainfab]

Thanks Bryan. I do know how it is with there just not being enough time

Originally Posted by bryankichler

received mine today looks like a good quality product now one of these days when i get home i might get to install this

[Aaronpetty82]

So to clarify I need a booster braket for 67-72, and a hydroboost adaptor?

[Captainfab]

If you are working on a '67-'72, then yes you will need either booster bracket that I make for the '67-'72's and this hydroboost mounting plate. Then everything will bolt up without drilling any more holes in your firewall.

Originally Posted by Aaronpetty82

So to clarify I need a booster braket for 67-72, and a hydroboost adaptor?

[El Campo]

Got mine today. Outstanding craftsmanship and beautiful parts. Fast shipping too! Great doing business with you, sir. Pictures will be posted when I get installed.
Posted via Mobile Device

[Captainfab]

Thanks for the kind words Matt

I'm looking forward to seeing your installed pics.

Originally Posted by El Campo

Got mine today. Outstanding craftsmanship and beautiful parts. Fast shipping too! Great doing business with you, sir. Pictures will be posted when I get installed.
Posted via Mobile Device

[cadtorque]

I'm very interested in your booster bracket and hydro-boost adapter plate. Any idea if the hydro-boost unit will bolt up to a 67-70 drum/drum master cylinder?

[Captainfab]

That master should work as long as it is the power brake master.

Originally Posted by cadtorque

I'm very interested in your booster bracket and hydro-boost adapter plate. Any idea if the hydro-boost unit will bolt up to a 67-70 drum/drum master cylinder?

[boonedogs72]

looking for the hydro boost bracket and firewall adapter for 67-72. I have a hydro boost setup out of a 87 diesel pickup and its going in a 72 chevy blazer.

[Captainfab]

Here is the for sale thread for the '67-'72 booster brackets

http://www.67-72chevytrucks.com/vboa...d.php?t=347484

Let me know.

Originally Posted by boonedogs72

looking for the hydro boost bracket and firewall adapter for 67-72. I have a hydro boost setup out of a 87 diesel pickup and its going in a 72 chevy blazer.

[woodwright]

Have you got any pictures yet of a hydroboost unit on a 67-72 firewall?

[Captainfab]

No I don't. No one has posted any installed pics that I know of for the '67-'72's. There are a couple of the '60-'66's though.

Originally Posted by woodwright

Have you got any pictures yet of a hydroboost unit on a 67-72 firewall?

[El Campo]

So I mocked up the Hydroboost on my 72 firewall. Ended up getting one out of a 99 Chevy 3/4 ton van. Not complete yet but these pictures will give you an idea of what it will look like. I did not even need the little square plate as the bracket that was on the hydroboost fit perfectly into the bigger bracket. Will post more when I get more done. Now I decided to go with disc brakes all around so have to figure out a master cylinder that will work

[Captainfab]

That looks good on there. Yeah some of the OEM mounting plates will work with my booster bracket. Some of them are offset though, and not centered as that one is. So we can add the mid to late 90's full sized vans to the list of hydroboost with the correct flat mounting plate.

For a disc/disc master you can use the '63-'82? Corvette unit.

Thanks for posting a pic of your install

[El Campo]

Would this one work? BENDIX Part # 11749
And do you happen to have any idea what size the outlets are on it? I THINK that it is 1/2 on the one circuit and 9/16 on the other.

[Captainfab]

Comparing the numbers, I would say it is a '77-'82 Vette master. The A1 Cardone part number is #101423 for the '67-'76 unit, and #101749 for the '77-'82 unit. A brand new '77-'82 unit is #131749. I don't know what the difference is between the 2 year groups. They both show to have a 1.125" bore.

I do believe the 2 fitting sizes are 1/2" and 9/16"

[El Campo]

I'm going to get the latter one. Will order it tomorrow and will update here soon. Am putting all AN lines on it too and will include part numbers for others who want to go that route too
Posted via Mobile Device

[jlsanborn]

Looks like this is the way I want to go. So, what year Astros use the HB? Are they all disc/drum and is that master appropriate for a disc/drum C10? Where is the prop valve on the Astro? Probably different threads for the brake lines huh? My current set is was manual drum/drum and I've done a front disc swap. Any old pump will work if you tee the return lines?
Thanks!

[Captainfab]

I believe all Astro/Safari vans had the hydroboost except for the first few years. I'm pretty sure from '90 and up would have them. Pull and Save usually has several Astro/Safari vans. I don't remember just where the prop valve is. I'm thinking it is right next to the master. One of my customers is using the Astro master on his pickup. Seems to work fine. Yes you can use a standard pump and just tee the return lines.

Here are some pics and info on the Astro/Safari master in Bubba327's thread

http://www.67-72chevytrucks.com/vboa...365170&page=17

Originally Posted by jlsanborn

Looks like this is the way I want to go. So, what year Astros use the HB? Are they all disc/drum and is that master appropriate for a disc/drum C10? Where is the prop valve on the Astro? Probably different threads for the brake lines huh? My current set is was manual drum/drum and I've done a front disc swap. Any old pump will work if you tee the return lines?
Thanks!

[Dragun12]

so why do you need an adapter to put a hydroboost on the 60-66?

[dennislbrooks]

http://67-72chevytrucks.com/vboard/s...d.php?t=175714




Sounds like a good deal from captainfab.

[Captainfab]

Thanks for posting that link. Some good info there

Originally Posted by dennislbrooks

http://67-72chevytrucks.com/vboard/s...d.php?t=175714




Sounds like a good deal from captainfab.

[Captainfab]

These hydroboost adapter plates are a direct fit you any of my booster brackets. There are some OEM hydroboost mounts that alse have the same pattern. My booster brackets are a direct bolt on for the given application, so you do not have to drill any holes in your firewall. The only modification you will have to make is to lengthen the pushrod. There are a few pics in the link posted above.

Originally Posted by Dragun12

so why do you need an adapter to put a hydroboost on the 60-66?