(This story has been updated to reflect that only new build Block III Super Hornets are being delivered to the Navy.) ST. LOUIS -- Boeing is going to convert the Navy's F/A-18E/F Super Hornets to the most advanced version of the fighter jet -- at a fast pace. Boeing plans to convert all its Block II Super Hornets to the Block III configuration, over 500 aircraft throughout the next decade, said Jennifer Splaingard, Boeing's F/A-18 and EA-18G vice president...