Dune Energy Inc., Houston, (Amex: DNE) plans to acquire Houston-based Goldking Energy Corp., for $302.5 million in cash and $18 million in stock in a total deal valued at $320.5 million. Goldking has properties on more than 65,000 net acres onshore the Gulf Coast of Louisiana and Texas. Proved reserves are 112 billion cubic feet of gas equivalent. Pro forma, Dune will have proved reserves of approximately 142 billion cubic feet equivalent (41% proved developed, 63% gas).