Proportioning Valve Special Socket/Tool

[mtull]

There's a special socket used to remove the valve from the proportioning block.  I can't find any references to the name or even an image of one.  I'd at least like to know the name of said tool if possible.  Perhaps the original tool was from Miller or Kelsey Hayes?

Thank you

[Floyd]

@mtull - Mike, I know you're looking for info on original tools.  I can't remember if I told you that Muscle Car Research, LLC used to sell that tool.  I know because I bought one and later sold it to Brake & Equipment Warehouse.  Did you check with them (Muscle Car Research) to see if you could still get one there or find out who made it for them?

[mtull]

I know because I bought one and later sold it to Brake & Equipment Warehouse. 

Thank you, I do recall you telling me.  I thought I asked MCR but I'll double check as I don't recall exactly what he told me.  I recently came across a miller tool with 8 sides but I'm not sure if it's the correct one or not.
 

[mtull]

I thought I found the elusive tool on eBay.  It has the right number of sides but the wrong dimensions. If only I were a machinist or had that type of skillset.   

[71GranCoupe]

Does this look close?

https://www.ebay.com/itm/224623557314

[mtull]

Does this look close?

It does look close.  It's amazing how much difference the correct search term makes, i.e. octagon.  Hopefully I can find one locally, if not, I'll contact the seller and see if they'd be willing to share the inside dimension.
I just came across imperial-newton.com.  Looks like they might offer octagonal impact sockets. I'll try and find out more info.

Great find @71GranCoupe ... thank you for the help.

[dennispsalm23]

https://www.youtube.com/watch?v=XA4L5UayFto

[mtull]

https://www.youtube.com/watch?v=XA4L5UayFto

Welcome to the Forum and thank you for your response.  I watched the video, I'm sorry I didn't see the relevance to my original question but I may have missed something obvious?  The sensor in the video, although Kelsey Hayes and similar to the one's used on E/B Bodies is not the same with regards to the number of socket sides (hexagon vs. octagon).  Technically something in the 3/4" ~ 13/16" ~ 20mm is close but not close enough to prevent rounding the corners off.  An impact may work better as the YouTube video suggests however that's how the one in the pic below ended up FOOBAR.

Thanks for the help