Edelbrock BBC Victor Head ( Bare 77409)The Edelbrock part #77419 Victor 24 Deg 340cc cylinder head features a rolled over deck, altered valve locations and partially CNC'd 199cc chambers for cost effective performance. The Edelbrock 77419 cylinder head comes bare and will need a final valve job and guide sizing before use. The 340cc rectangle ports produce impressive flow and great power on competition big blocks with 4. 470" or larger bore. Exhaust port exits are raised . 534".