Cambridge (Mass.) Retirement Board revised an RFP posted in August. The board of the $710 million fund specified that it is searching for a growth manager to run $70 million in active domestic large-cap equities, either in a commingled fund or a separate account, said Rafik Ghazarian, a senior consultant at Segal Advisors. Ellen Philbin, board administrator, did not return a call seeking comment. The RFP is available on the Segal website at www.segaladvisors.com. Proposals are now due by 10 a.m. EDT Oct. 9; they had been due Sept. 27.