Those types of equipment that are in the Body won't have a facing, so wouldn't be able to be used to target something, which means TAG and NARC would be on the same list as a Machine Gun or Gauss Rifle.
ECM and C3 don't need a facing, so could be in the Body. The only good news there is that Combat Vehicle Structure is VERY low, so once one is past the Armor it shouldn't take to much more to kill it.