Yes the NPI heads can be port matched to the PI intake. Whoever does this will need to weld some aluminum to the coolant ports to get them to match the PI intake gaskets perfectly or you can use RTV on the coolant ports. It is not an easy task to do the welding method. My NPI heads are done this way and the only way you can tell that they are NPI heads is by their casting number, otherwise they look like PI heads.
What does it cost to have the NPI heads port matched? Is it worth it, how much of a gain could be expected assuming they received a decent p&p? I would have no problem using RTV on the coolant ports, so the aluminum welding in my case would not be necessary.
though do need to get a quote from Randy on the timing cover gasket.
