LA vs Magnum

I think all the EQ magnum heads are made in New Zeland. They have thickend area between the valves to fix the Chrysler head craking problem. They also have thickend decks, and they have better flow than a Mopar RT head. They also have a higher nickel content that makes them harder. And they are brand new. Why use junkyard heads that arn't cracked now but might be next year, after you sank a bunch of money in them.
I used them on my 340 and had them milled down to a 57cc chamber. The machinest said they were harder to mill because of the nickel content,than a BBC race head.