Hydraulic roller cam and stock rocker arms

I think it was 1963 the dragmaster dart rail won the winternationals.
They used a 383 with a 413 crank 63 style max wedge heads and a identical
set of rocker arms as Jim pictured. Not sure what type camshaft they used.
Since they were out of So.Cal, did your dad by chance help them? I was at
the then Palmdale International Raceway and your Dad tuning a friend of
mines 1958 Ply Golden Commander it was running pretty respectable times.