Quote: any buddy use ProMaxx Performance 9440 - ProMaxx MAXX Series Big Block Chrysler Aluminum Cylinder Heads Details
Big Block Chrysler 210cc/295+ CFM Additional Cylinder Head Specifications Valve Angle: 15° Valve Seal Material: Viton Spark Plug Type: Angled Retainer Material: Steel Maximum Spring Lift: .600" Hydraulic Flat Tappet think about use them on 66 440 factory steel crank factory steel rods lighten polish with JE or ROSS pistons full floating pins
Looks a lot like Edelbrock Performer RPM 440 head. I wonder if it's just Promaxx working a set of the sidewinder castings?
