My last post on this subject for now... I sent T&D an e-mail from their web site with the following question:

Subject: Advertised vs installed rocker ratio

Question: The custom T&D rockers for BB Chrysler Edelbrock Victor heads that I purchased from a vendor last summer are stamped as 1.60 ratio, but measured 1.59+ w/ soft checking springs and 1.54+ w/ 600# open springs with the geometry set correctly for .650". I was expecting (assuming?) the loaded ratio would be approximately the stamped 1.60, not .05 less. I have since sold them, but want to know if I order another set whether I need to specify 1.65 to get an installed & loaded ratio closer to 1.60, or if there was something "wrong" that my first set didn't deliver the advertised ratio.

Thanks,
Brad Haak