Less than four months after U.S. Ambassador Christopher Stevens was killed in an attack in Benghazi, Libya, Grass Valley’s city council will consider renaming its most prominent project after its slain native son. The proposal would rename the planned Dorsey interchange, a nearly $25 million project to add on- and off-ramps to Highway 49/20 at Dorsey Drive, after Stevens, who was born in 1960 in Grass Valley. “It’s such an important project for us, and it’s funded by local, state and federal money,” said Grass Valley Mayor Dan Miller. “We’re trying to get his name on there.” The council will …