The Ford V-8 Engine Workshop|
4V Closed Chamber Cylinder Head
These closed chamber (or quench) style heads are found on the 1970/71
M-code 351C-4V. The heads feature huge ports, 61.3-64.3cc combustion chambers,
2.198" intake valves and 1.715" exhaust valves. These engines are designed for
hydraulic lifter camshafts and use slotted rocker arm pedestals, for non-adjustable
rockers. These slots maintain the angle of the rocker arm and the pushrod alignment.
These heads can be modified to fit a 289 or 302 block for a homemade Boss. The square water outlets in the upper corners of the deck face must be plugged. This can be accomplished by drilling and tapping the casting for a pipe plug. A new water outlet on the intake manifold face must be drilled.