I would say you need the 1 1/32" master cylinder. Unless you have the same problem I had then it will take 1 1/8" master. I beat myself up for a long time with mine until I went with the 1 1/8" master now its high and solid.
I went with Inline also, bent and flared all my own lines. Line was easy to work with just make sure you have a good flaring tool. I bought all straight lines, SS fittings and clamps with the coil that goes over the line.
What was the part number of the Wilwood kit you bought? Here is a link to the Wilwood site and the Drum brake kits for a 67 Barracuda.
http://www.wilwood.com/BrakeKits/BrakeKitListFront.aspx?year=1967&make=Plymouth&model=Barracuda&modoption=9%22%20Inch%20Drum%20Brake%20Spindle
As you can see...
If it still leaks after the line wrench, just get a new tee. Have seen them on Ebay. Because they are brass when they are over tighten the inverted flair inside gets crushed and causes a leak.