I called T&D and the part number for TF heads is 8260 and you can request the rocker ratio you want.
Something I wonder about is that TF recommends using the HS rockers designed for the Edelbrock RPM head. The T&D rocker for the RPM head is 1.520 long but for the TF head they spec'd 1.480. I couldn't find the spec for the HS rocker but it seems T&D calculated a shorter length then TF did. Maybe TF was just trying to use the closest existing part available. I'm hoping T&D's measurements are more accurate.
Andy, I know you tested both of these parts; did one fit better than the other? I did read your rocker arm article but I don't recall if your commented on this.
