Well that’s the best I can do on this set of heads.

Is that 52-1/2% of the bore size? That would be a 2.14 intake, which I guarantee would take “A LOT” of finagling to get to fit the chambers. I’ve been told 2.08 will usually clear without doing anything drastic with guide location in most heads.
I'm sure that an max effort valve size, and yes things would need to be moved around.