The Montana Board of Investments, Helena, interviewed four finalists to become the $6 billion system's first investment consultant, said Carroll South, executive director. R.V. Kuhns, Ennis Knupp, Independent Fiduciary Services and Mercer Investment Consulting made presentations. Mr. South said he expects the board to make a decision before its next meeting on Sept. 16. Mr. South said the board hopes the new consultant can present a tentative report of recommendations in December.