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Cutting the car for a dual MC setup hints/tricks?

Just want to make sure I understand some of the in's and outs of the brake system before I go order a bunch of parts:

I am going to run a 3 MC set up, all wilwood 260-6087 .625 for the clutch and the front brakes 260-6089 .750 for the rear brakes. I am going to remove the 4-way union that previously split the front brakes from each other and the rear brakes and the brake light switch with this wilwood proportioning valve 260-11179 that has a built in brake light switch.

The connections for the output on the proportioning valve are indicated to be 3/8 - 24 inverted flare female. As far as I can tell, the fittings on the lines coming from the original 4-way union are 3/8 - 24 but with a single or bubble flare. Those 2 are not compatible correct? So to mate the existing brake lines to the new proportioning valve I would need an adapter. The brake lines in my car are brand new so I'd rather not cut the ends off and put new fittings on if I can avoid it. Any idea if that is the correct adapter?

Thanks!
 
Actually, now that I read the info on the adapter a bit more closely, I actually need the exact opposite of that adapter. A male 3/8-24 inverted flare to a female 3/8-24 bubble flare.

sigh.

why does this stuff have to be so confusing?
 
Well, I can't seem to find the adapter that I need so I guess im going to have to purchase the appropriate fittings and some 3/16" line and go make my own.
 
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Well I went for it, notched the hole for the later model pedal box and got my new wilwood master cylinders bolted up
 
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