Legends car gearing can vary a lot depending on track conditions and your driving style, but for shorter ovals like Evergreen and Wall Stadium, most people run a shorter gear to get off the corners quicker. Wiscasset and White Mountain usually need a slightly taller setup to keep the engine from over-revving on the straights. Your best bet is to start with common baseline ratios from other drivers, then fine-tune based on RPM at the end of the straight and how the car feels on corner exit. Track surface and tire choice can make a big difference too.