Cylinder heads refurbished with new valve lash for 351W 1969-74, according to Ford.
See specifications according to the document below. The documents specify casting numbers and casting dates, etc.

The following parts are compatible for the 351W engine 1969-74 with these cylinder heads (standard components)
Rocker arm kit: #6564-181-1041.
Pushrod: #6565-192-1399.
Valve lifters: #6500-VL35.
Standard camshaft: #CS674. No performance camshafts, as the valve springs limit lift and the rocker studs also have restrictions.