An improved harvester head assembly is provided. The harvester head includes a housing which is rotatable between a horizontal orientation and a vertical orientation. The harvester head further includes feeding system with a central feed roller and a pair of outer feed rollers that are moveable relative to the housing. The harvester head also includes top and bottom saws. A pair of delimbing knives are pivotable relative to the housing. A manifold and valve assembly is disposed in the housing and includes a plurality of solenoid valves which are configured to channel hydraulic fluid to motors and actuators to power and/or move a plurality of the components. The manifold and valve assembly includes a manifold with a rectangular shape and which is oriented with its long dimension extending in a longitudinal direction. The solenoid valves are spaced from one another in the longitudinal direction.