Let pork stand at room temperature 30 to 40 minutes. Meanwhile, prepare Cilantro Slaw. Light 1 side of grill, heating to 350 to 400 (medium-high) heat; leave other side unlit.
Brush pork with olive oil, and sprinkle with salt and pepper.
Grill pork over lit side of grill, covered with grill lid, 4 minutes on each side; transfer pork to unlit side, and grill, covered with grill lid, 10 minutes on each side or until a meat thermometer inserted into thickest portion registers 14
Let stand 5 minutes. Thinly slice pork.
Place pork in warm tortillas; top with Cilantro Slaw.