Wow Jmac some useful info there mate some great experience.

Hey D, very happy with the upgrades i must say. Na the port was always oval on my manifolds, with the blow through i had a 350 holley adapter plate welded to the inlet and then ported out as much as possible. then the 350 holley (7448) bolted straight up and i used a planium off a valiant that came with a holley standard. It was a match made in heaven and looked really nice and neat. The only thing was (good or bad) it sat a little to high and i couldnt close my bonnet so i was forced to cut a hole and use a offset bonnet scoop. I like it but the cops diddent.