CHAMPAIGN—Nathan Scheelhaase threw for career-best 416 yards and two touchdowns Saturday to lead Illinois to a 42-34 win over Southern Illinois. But the Illini had to hang on late to beat the Football Championship Subdivision school.Trailing with 44 seconds to play and fourth down at the Illini 3-yard line, Saluki quarterback Kory Faulkner threw too high for leaping wideout Adam Fuehne.Illinois was up 42-24 with as little as 12 minutes left.The Illini offense was mostly Scheelhaase. He was 28 for 36 and his second-quarter touchdown passes to Jon Davis and Josh Ferguson built a 25-7 halftime lead.Ryan Lankford caught six passes for 115 yards.The temperature hit 95 and the heat index 108. Big Ten officials said one linesman, Bob Davis, was hospitalized for heat exhaustion.