Stock sb rocker arm ratio ?

What is the easiest way to tell what ratio that my stock small block rocker arms really are ? I know mopar syas they are 1.5 ? I have heard they really very to as low as 1.3 ? I have a 292/509 cam in the 360, I don't really want to open my wallet for roller rockers. I do know many people have run the stock rockers with know problems. This does include me. I have used a 292/509 and a 284/484 cam both in 340's with no issues. I just want to make sure the ratio is good to get the most out of the lift. Thanks :violent1: :-k :burnout: