That sounds like it should be a good starting point. Temps should be well below 180, but 180 is the upper limit I like to stay below for motor longevity. For offroad you should see average running temps around 120-140. Gearing is specific to track size and layout of course. Our motors are very high torque and smooth, I would recommend taking the most common ratios you were running before and go up a tooth or two. Thanks and let me know if you have any other questions!