There is nothing special about the 95 Cobra R 351W. It uses the same GT40 iron heads, cam, 1.7 roller rockers, and 24lbs injectors as the 5.0 Cobra engine. There is a slight difference in the GT40 intake. The 351 uses a 351W GT40 lower, which are identical as the 5.0 GT40 lower but wider. The upper manifold is the same except the Cobra R has 351 Cobra R cast into it.
The one major difference is in the cooling system. The Cobra R uses a de-gas system and a better oil cooler.
91 LX 337 Incon Twin Turbo
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Maximum Motorsports front to rear
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and it's JUST-N-LX