As Pascal said. If you want to switch to the Ligier ask in the race thread. But i will answer you here to save time.
You can switch to the Ligier for this race if you wish, but make sure you practice with it before switching, the Fondmetal and Ligier are very very different cars, it won't be as simple as just jumping from one to the other and your setup will work perfectly.
If you want to switch, please confirm in the race thread.