Adjustable brake valve plumbing?

[mason72]

I am adding a wilwood adjustable brake valve and can't figure out how to adapt the rear 1/4" brake line with the factory 9/16 thread size down to the 3/16 line 3/8 thread. I'm converting to a hydro boost also.
Anyone know how to make that brake line work?
Thanks Sean

 

[mason72]

 

[frankin5]

https://www.amazon.com/Dorman-785434-16-Brake-Adapter/dp/B004IYVJ7C

 

[mason72]

Thanks. I tried a couple parts stores and couldn't find anything.