Complex sentence: According to the museum, the Divan's engine and suspension require complete rebuilding while the interior of the car is also in need of replacement; it expects the project to be labor-intensive and replacement parts to be difficult to procure.
Split into simpler sentences: According to the museum, the Divan's engine and suspension required complete rebuilding while the interior of the car was also in need of replacement. It expected the project to be labor-intensive and replacement parts to be difficult to procure.