In a large bowl, whisk together first seven ingredients; stir in bread and raisins. Transfer to a greased 4-qt. slow cooker. Cook, covered, on low 3 hours. (To avoid scorching, rotate slow cooker insert one-half turn midway through cooking, lifting carefully with oven mitts.) , For sauce, place butter, sugar and corn syrup in a small saucepan; bring to a boil, stirring occasionally. Cook and stir until sugar is dissolved. Remove from heat; stir in bourbon. Serve warm sauce over warm bread pudding.