Does anyone offer a 9/16-20 "female" inverted flare adapter, tee, etc? Or, can someone suggest adapting a 9/16-20 inverted male withh a more common size that a 3/8-24 brake line can be attached. I'm open to using AN fitting too.

Just to clarify, this the 9/16-20 inverted flare, male fitting that is found on the "front", rear brake line which attaches to "rear-out" on the proportionate valve on a '73 Challenger with disc/drums).

Step two is to cut off the 9/16-20 nut & inverted flare and add another tube nut and then reflare the line. Just want to make sure that I'm not overlooking something especially since I'm dealing with a stainless steel line.

Why work so hard...just flare you own with this:

http://store.fedhillusa.com/a163.aspx

I keep them in stock.

They do make several different adapters, but they make the lines look cobbled together...like on my '65 Power Wagon. I'd buy the correct nut and re-flare.

Jeremiah

Close however, it's a 9/16-20 "female" adapter that I'm seeking.

It will look something like this.
http://store.fedhillusa.com/ad5br.aspx The 9/16"-20 male inverted flare end, needs to to screw into the port.

I suspect I'll cut the line. I just wanted to make sure I wasn't over looking an existing fitting/adapter.

Standard inverted flare fittings aren't typically sized by the nut size but by the tubing size. What size tubing are you using?

Available at your local Auto Zone

6PakBee, that would be a 3/16" line.

FuryUs, that is a 9/16 in. male fitting you found. I need an adapter or tee that the fitting you directed me to, screws into.