Astro Van Hydroboost Mounting Plate, Bracket, Adapter

Description

This is a reproduction GM Astro Van hydroboost mounting plate. I had these mounting plates made up to fit any Bendix/Bosch hydroboost that I have come across so far. Note that it has the correct "tooth" that engages in the notch on the side of the hydroboost which is required to keep the hydroboost from rotating on the mounting plate should the nut loosen. If you drive aggressively you have probably noticed that things will loosen up over time and you definately don't want your brake master cylinder to suddenly rotate on you.
You will need to source/fabricate your own nut removal tool or search for the correct Kent-Moore J29192 socket in order to remove/replace the nut from the back of your hydroboost. The nut size is 1 15/16 and the socket can't have an outside dimension greater than 2 1/4" in order to be able to fit into the recess of many hydroboost angled mounting plates. Just be sure you can re-torque it to the OEM specs of 110 ft/lbs., over torqueing can result in a cracked nut. If you have a hydroboost mount where the nut is inset you can cut away the mount to allow a crow foot wrench to fit. Sunex crow foot #97750 is 1 7/8" and will fit on there.
What does this plate do for you? It offers you a 4.40"wide x 4.60" tall, flat surface to mount your hydroboost with. Because it is flat it allows you to invert your hydroboost in order to have greater clearance with your valve covers as it places the accumulator over on the driver's side of the engine compartment when inverted. Your master cylinder will install normally provided you are using the correct master cylinder to begin with (the stub that inserts into your hydroboost should not have an outside dimension greater than 1 5/8" if you are fitting to an early hydroboost and the indent on the MC piston should be about .25"). The bolt holes cut in this plate are large enough to fit 3/8" bolts to mount to your firewall. You can press studs into the plate but it's a very tight fit as the holes in the plate are not splined like the studs. Bolt hole spacing is 3.40" horizontal by 3.50" vertical, bolt holes are ~0.420". Very slight filing will be required on the tooth to completely fit, ensuring snug mating. The 3.4" horizontal bolt holes can be quickly slotted to 3.5" with a round bastard file.
These come in bare steel, they are cleanly cut by laser and have the same bolt pattern as the Astro van which is a direct bolt on in many applications. Additional bolt holes could be drilled to fit other patterns if desired and these plates could certainly be trimmed down. You can paint it, powder coat it or have them chromed if you like the shine.
If you've looked around for something like this then you know it costs you almost twice as much if you can find it anywhere. If you bought a hydroboost but had difficulty mounting it due to the angle in the mounting plate, or you are unable to invert it due to the mounting plate then this is the plate you are looking for if you have enough room under the dash for the end of the hydroboost and the rod length to give you stock pedal height. I've sold a large number of Astro van hydroboost to hot rodders and Jeepers expressly because of the ease of mounting and the ability to invert the hydroboost without angling the master cylinder down. If you need more than one I will try to keep a stock of these on hand so just ask.
***Note, this is DIY part for people who know what they are doing and know what they need to get it done. It's a relatively cheap part and I don't have time to support tech questions on this part so please don't ask. If you need a bolt in hydroboost I spent the time figuring out how to make those work and.... I sell those in my other listings;)
Keep an eye out for my other listings if you want to buy a hydroboost. I fabricate mounts also so you don't have to cut/thread the hydroboost rod in order to match your pedal assembly. Buy your hydroboost from me and I'll help you get it set up, but please ask to work it out with me prior to purchase to be sure it's something I can accomplish.
Shipping is figured for one item only, I'll work with you if you buy more than one and will only charge the USPS Flat Rate for however many I can fit in an envelope/box. ;)
Shipping is quoted for the US only. I have shipped to Thailand, Mexico, Russia, New Zealand,
Brazil, Panama, Latvia, Spain,
Turkey, Sweden, Quatar, Norway, France, Italy, Germany, Denmark, Dubai, UK, Canada, Greenland, Iceland, Australia and South Africa, but please contact me prior to purchasing so we can work out acceptable shipping arrangements. I will provide you with a shipping quote for you to consider PRIOR to your purchase.  I will only accept paypal on purchases outside the US. I request that in the text of your message you indicate
the country and postal code
you wish the unit shipped to.
Disclaimer:
Hydro-Boost is a registered ® trademark of the Robert Bosch Corporation. All products herein are modifications and not directly or indirectly affiliated with the Robert Bosch Corporation unless noted. Custom Power Brake (aka Sterlingworth16) is not affiliated with Bosch. All products herein are designed for off road use only and are not DOT certified. The process to meet DOT certification is extremely lengthy. To my knowledge, no other aftermarket modifier of hydroboosts has their units DOT certified for street use either. Any purchase of product and/or use of tech related to these products constitute the understanding that brake line pressure will be dramatically increased and the acceptance of liability or risk related to use.
Key words: hydrobooster, hydro boost, hydro-boost, hydro-booster, hydraulic booster, brake booster, astro van, safari van, Jeep CJ, Jeep YJ, Jeep Wrangler, Toyota FJ40, Dana 60.