Christian Ried's privateer Porsche 963 outfit entered the final three races of the World Endurance Championship and IMSA SportsCar Championship last season ahead of full season programmes in both series in 2024, beginning with the IMSA season opener at Daytona later this month.
It was announced earlier this week that Bruni and full-season co-driver Neel Jani will be joined by Romain Dumas and Alessio Picariello for the 24 Hours, with the latter pair due to drive the car for the first time at next week's Roar Before the 24 pre-event test.
Speaking to Autosport, four-time Le Mans class winner Bruni said the "Roar is going to be like a shakedown" for the Proton team that has not run the 963 since the 2023 WEC finale in Bahrain.
"This year is also again everything new," the Italian said.
"We didn’t do any testing or anything else, even a seat-fitting or something since Bahrain, so it’s really a question mark, question mark, question mark.
"Also my team-mate [Dumas], he’s going to come back from Dakar when the Roar is going to start so it’s going to be challenging, I would say.
"But it’s like this, we cannot change it."
Source: Autosport