Potlatch ( PCH) shareholders backed a plan to distribute 9.1 million shares and $89 million in cash. Potlatch said the distribution is payable Friday in connection with the company's Jan. 1, 2006, conversion to a real estate investment trust. The share issue will boost outstanding stock by 31%. Based on the new share count, the company expects its quarterly distribution to be 49 cents a share. The Spokane, Wash.-based real estate investment trust also said it will join the S&P REIT Composite index Friday.