Hyd Roller vs Hyd Flat tappet on SM heads

They have aeroflow etched on them - but it is the same casting as the speedmaster heads. They just have a different valve job cut on them and the brand name etched on.
Valve sweep before the kit went on was quite wide and off towards the edge of the valve tip and the rocker arm would contact the retainer with a straight spring (1.45" diameter retainer I think it was). Contact patch after the geometry kit went on was centred and about 0.030" or so wide.