You won't be able to tell on the rockers without pulling the valve covers. The valve covers have baffles which is a flat shield between the rockers and the cover.Curious though. Is there an easy sure sign to see if the valve covers been off? I wonder if this car has 1.7 rockers in it or not.
I pulled mine off for powdercoating and was pleasantly surprised to find a set of T&D 1.7s under there.