I checked out the link........ looks like “in theory”, based on the difference in bolt hole positions between the two stands after being milled ......... one head would have(could have) used the offset stands, the other the non-offset stands.
No telling exactly how that would make things look without mocking up some parts.
Based on the pics of the two different bolt hole locations in the heads........ the rocker to valve tip relationship “should” be better on one head vs the other using the current parts on hand.
