Reading up on the LM NISMO it seems however that the car mostly is FWD only:
When using the I/C engine, certainly, it's the 8MJ flywheel system that drives the rear wheels, but as FM doesn't simulate such systems they just send 752hp to the front wheels, that said, the car in question didn't use it's 8MJ system to drive the rear wheels at Le Mans, and instead opted to send 2MJ to the front wheels, so based on that, the FM6 car is somewhere near the spec ran at Le Mans.
Still, it would have been nice to have the car as it was intended to run, no reliability issues in FM