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The Victor series manifolds were designed for "race engine" applications by Ebok and subsequently purpose cast with necked down intake runners. That allows the manifold to fit a multitude of heads and different applications with some port matching, which is assumed to be done with a "race engine" anyway. As Barry said run your port matching 2 to 3 inches up into the runners, being aware of you pushrod hole to intake runner wall thickness. I don't like polishing the inside of already high flowing intake runners, like the Victor has. It hurts the already deficient fuel atomization and charge mixing.

My tunnel wedge was essentially the same way out of the box, necked down intake runners that required extensive port matching.

Before you button it up make sure you're not getting excessive pushrod hole to pushrod contact too. A lot of aftermarket manifolds required pushrod hole clearancing, especially with big cams 'n fat heavy duty pushrods.