Offenhauser 1069 "400" Cylinder Heads for Flathead V8
Finned for High Heat Dissipation
Greater Water Capacity
3-5/16" Bore with 4" Stroke Crank (255cid) Equals 9:1 Compression
3-5/16" Bore with 3-3/4" Stroke Crank (239 cid) Equals 8.6:1 Compression