Paul
check page 4, loc cap system
www.manleyperformance.com/dl/2010/cylinder head components
This will pretty much give you an idea of what manley developed in 1990s that is sort of what I was doing in the 1970s
the cutaway profile drawing shows visually how the lash cap cap be set up to rest on the keepers so that the spring pressure is directly against the rocker tipand the valve stem is in tension at off the seat duration of the cam lobe