J.P. Morgan Chase last week launched syndication of a $350 million facility on behalf of ACT Manufacturing, replacing $250 million of an existing bank loan and tacking on an additional $100 million of new money. The new $350 million credit will be divided between a $150 million revolving credit priced at LIBOR plus 3%, a $100 million term loan "A" priced at LIBOR plus 3%, and a $150 million term loan "B" priced at LIBOR plus 31Ž4%. Officials at Act Manufacturing did not return calls. J.P. Morgan Chase did not return calls. The Hudson, Ma-based company is a contract manufacturer of circuit boards and electrical cable.