360 Magnum Build w/ V Belt Configuration Question

Six Barrel Bill said

After a lot of thought, investigation and working with our engine builder. I believe these are the heads we are going to go with. Of course you can go with more expensive heads that are made out of aluminum but for my daughter's budget and based on these performance numbers it seems like a good deal.

Mopar EQ Cylinder Heads

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Have you talked to PIE about these heads? That is the same description they used when they were preparing the good Engine Quest heads that were cast in New Zealand. Do not trust any advertisements right now about cast iron Magnum heads. Most places still have the same info, but they are using the stock style replacement castings, since nothing else is currently available.
Is there a problem with the old heads on your engine? If not, just run what you have and save your budget a bunch of money.