360 head porting for big power (500HP ?)

Just to really muddy the waters, my love is the 'Poly 318'.
No A-bods came with this option, so its a strange concept.

But we have built maybe the only 402ci Poly in the UK and its HOT!
I see better flow through the heads than any 340/360 iron heads.

I guess our 'new' Duster will be 360 stroker, but my 402 Poly Coronet will be more fun on the street?

402ci Poly heads.jpg