Info wanted on Indy LA X heads
OMM no one is offended but your original question was pretty specific and we answered accordingly;
Are they a significant improvement over factory X heads?
You did not say that you had pro-level ported “X” heads on hand already so the answer is still a resounding yes, the LA/X heads are a significant upgrade over any factory iron head. Our answers to your question would have been completely different had you not left out that one particular piece of information.
I also agree that comparing W2s to the LA/X heads is not valid. As you are aware, W2s were a clean-slate design race head as opposed to a garden-variety passenger car, emissions-compliant part. Sure you can port the crap out of any factory iron head to flow decent amounts of air but it’s still a factory iron head with a pronounced pushrod pinch and standard, non-raised ports.
Your expectation of finding a “wild head” seems a bit curious since the RHS heads were marketed as a high performance factory iron replacement head - nothing wild about them and a 500hp head all day. Sorry you wasted your time but it could have been avoided with 5 minutes of research.