Seriously (Short side radius ) meaning the shape of the bottom of the port pathway. That's number one ,to win the game. And a books and chapters to read ,to get it right. Or grab a bad cylinder head ,and not carve ,and ask questions.
"Pushrod pinch"? That's the restriction you see on an LA head ,around the pushrod. Unless you need 280 c.f.m. on a,intake port. Don't worry about it.
