Mississippi Health Care Trust, Jackson, has selected four domestic large-cap equity managers. They are: J.P. Morgan, enhanced index; Scudder Kemper, contrarian value; Legg Mason, relative value; and Alliance, growth. Allocations will be set in December, and portfolios will be funded from new cash flow from Mississippis settlement with leading tobacco manufacturers. The $300 million fund is expecting $221 million in new money in December and January. In addition, fund officials last month hired Froley, Revy to run a $45 million convertible bond portfolio.