IIRC can't the old lines from the disc brake donor be used here?
Also, I checked
www.rockauto.com and the pictures they show sure seem to look right to me, nothing like the pic of the wrong part in that how-to article. I think the writer may just have had bad luck with the local Napa.
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95 Isuzu Trooper Daily Driver
86 Isuzu Trooper reliable backup
77 LUV 2wd stock beltway blaster (resting)
79 4x4 LUV project: 2.6L, 5spd, 31s (eventually)
MEPR: Man, my 4x4 makes all other LUVs look good