The Speedmaster heads do not have LA pattern intake mounting. The thread PRH linked is a good read on those heads and if I remember correctly, the two heads
@MOPAROFFICIAL received initially were a little different, so he sent one back to get another one so they did match. I assume that means there is two foundries in China making them, or at least two sets of tooling.
I think some shops are drilling the LA pattern and selling them when they offer the current EQ castings but I have not seen any in person yet.