I’m pretty sure they are not.
If I gave that vibe I didn’t mean to. I’ve just never been able to get a good explanation of the differences.
In your pictures I can easily see that there is a cup not just a platform. I’m going to cc these heads and see if they’re Denver’s.
I kinda hope they are not because I’d like to replace the top end of my wagon motor using these. And I’d like to keep static low for driving around town.
Thanks loads for your pix, they helped a bunch.