i have a port and polished head i port matched my own intake manifold... its easy ... just take the gasket and cut it out to the size of the wholes for the intake side then trace them with something on to the intake mani. then take a dremel tool and port out your intake mani to the trace marks you have made... its actually pretty simple... then one you have ported to where ur marks are gone i saned mine with a dremel tool after and then i polished it but dont for get while porting it to go a deeper then just the edges....then when finished I took the gasket and made the holes a little bigger then the head and intake mani for no restriction.