Flight batteries and ground batteries are the same. Ground batteries sometimes come in a plastic container, because the extra weight doesn't matter - but they are still the same if the numbers are the same.
It seems the rock crawler uses 4S NiMh and not LiPo. And you're not stating how many cells (voltage) your LiPo has. Now, if your 180mAh batteries are 2S (7.4 volts) then you can use it. On the Horizon Hobby website,