Your E2 cam is valuable, and I'm not sure you'd get enough lobe size to track accurately since the base circle gets a big whack to make a pointy lobe into a lumpy lobe.
One-off rockers are going to be very expensive in value for money. Not all heads get high benefit from lift increases, and it's not possible to do this without extending the duration.
The nominal (paper) duration will be constant, but the duration at every point of lift will be extended.
Many of the GMC cam data I've seen shows some exhaust bias (more exhaust duration than intake), do you have the entire data set for the E2 and E3?
