Indy LAX or J-heads?

I don’t think the W2 was really mentioned or a consideration but I agree with that one as well. While a bit off topic or list of heads for use, the W2 is the only high hp head in iron and still a worthy head. And the above statement of, there heavier, so what, works with those heads to a degree.
Are you racing for money? Do class rules require iron?

Final note, LA-X over any OEM production iron head.