Application Notes: Cast iron or aluminum heads - Extra large bore - Not recommended for Eng. bores 4.625" or larger - Suitable for marine applications
Product Notes: Fits Gen IV pass. car and H/P block; Pre-1971 blocks may require modification; Fits Gen IV truck and Bow Tie block; Fits Gen V block; Fits Gen VI block; One coolant hole per end; Three lower coolant holes; Minimal brinelling of aluminum heads