E58 400 plus HP Dart sport build

rumblefish360 said
Here’s the thing, there are several companies that offer a 1.6 roller rocker but they do not all exact lift the valve a true 1.6 mathematically. Or in actuality. Is the differences in the contact point of the roller tip the push rod contact point and the frog buckram point and the differences between them, additionally, pushrod length also has a play in this. Double check to see what your actual lift is.
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According to build sheet and what I and builder did it is as specified a 1.6 ratio. The stock push rods were short so they were changed out and measured for correct length and what we wanted to accomplish. Would not have used them anyway as pretty old as they were old tired looking rocker assembly.