I was told that my SBC Crate engine uses the Vortec heads. I see that there are three water ports on each head, but all of the Edelbrock Vortec intakes I have seen don't use all 6 of the inlets.

Is that normal? One, the EDL-2116, only has two of the inlets open. Another I saw only has four open. I'm still learning about engines, so maybe it is supposed to be that way? I can;t find a photo of the bottome of teh EDL-7116, but I think it only has 4 of the ports open, too.

Some of the things that the previous owner said about the car were wrong (and he put a regular intake on these Vortec heads) so I wonder how to tell if this is really a Vortec crate engine. Anyone know how to tell?

Thanks in advance!