305,REBUILT,CAST# 376450,7 BOLT EXH Sold As Pictured. CUTLASS 78 8-305, 4BC. CUTLASS 79-86 8-305 (5.0L). This is a REBUILT CYLINDER HEAD. CENTURY 78 8-305 (5.0L), 4BC. REGAL 78 8-305 (5.0L), 4BC. We apologize for any inconvenience this may cause and appreciate your understanding.