Heads used on 327/350/383/400 SBC engines without steam holes is Felpro #1003. All Speedmaster 23deg. SBC heads use standard 14mm. x 750" reach, 5/8 hex, gasket seat sparkplugs like NGK R5671A-7, Autolite 3924, Champion RC12YC, etc.
Chevy SBC 350 217cc 68cc Straight CNC Solid Flat Assembled Cylinder Heads
Chevy SBC 350 217cc 70cc Angle Full CNC Aluminum Bare Cylinder Head
Chevy SBC 350 217cc 64cc Straight Full CNC Aluminum Bare Cylinder Head
Chevy SBC 350 217cc 68cc Angle CNC Solid Flat Assembled Cylinder Heads
Chevy SBC 350 217cc 64cc Angle Full CNC Aluminum Bare Cylinder Head
