Product details:

World Products 043610: Cylinder Head, S/R, Cast Iron, Bare, 67cc Chamber, 171cc Intake Runner, Chevy, Small Block, Each - World Products S/R cylinder heads make it easy to rebuild your engine affordably. They feature hardened steel exhaust seats compatible with unleaded gasoline, extra-thick decks and walls for improved reliability, tapped for screw-in rocker studs, and machined valve cover rails to eliminate leaks. With the strength, reliability, and great price of these heads, there's no reason to bother with worn-out junkyard castings or new OEM castings you can depend on World Products to help you do it right. World Products. 043610 fits these applications: CHEVROLET 6.6L/400 Chevy small block Gen I, CHEVROLET 5.7L/350 Chevy small block Gen I, CHEVROLET 5.4L/327 Chevy small block Gen I, CHEVROLET 5.0L/305 Chevy small block Gen I, CHEVROLET 4.9L/302 Chevy small block Gen I, CHEVROLET 4.6L/283 Chevy small block Gen I, CHEVROLET 4.3L/265 Chevy small block Gen I, CHEVROLET 4.3L/262 Chevy small block Gen I.