Actually, I have a set on the porting bench right now. Todd from CompWedge Engines and I are doing a joint venture of sorts with them. I will have a nice street/ strip 440 going on my dyno in the near future with a set of these Sidewinder heads to see how everything works out.
I hope to get some e.t. numbers shortly thereafter.
I'll update everyone as soon as I have more to tell.
Keith