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Yep looks like one of the old A/FX cars it's stuffed into. Wicked cool cars those are.

Not Denny but yes it is. The SOHC was based on the 427 sideoiler block for which it was designed. It's pretty much the King Daddy of the FE's.

I'm wondering what head castings they were too. Dove made a few versions of the tunnelport heads and intake. Based on the factory molds and most retained either the SK or factory casting number....

Also on the tunnelport heads....in stock trim there is no flow gain over .600. They flow 292-300ish as cast. Ported maybe 320-340 although some claim more. I'd also like to know what cam they used...

I Tivo'd that show and have watched it a few times. If I remember correctly the 409 showed a tic more HP on the dyno then they listed in the results. I'll have to watch it again to be sure but think...

Yes you are right it is a tunnelport engine. The tunnelport heads and intake were over the counter parts. And never came on a production 427.