Kinda related to the W2 stroker discussion, just wanted people's opinions/thoughts on this. How much if any real world power does the standard flange cost on a staock size (which is kinda small) W2 dual bolt pattern head on say a 550 horse/550 lb/ft combo?

Does anyone have a picture of the two flanges or gaskets overlaying eachother?

I remember running my first set of W2's back in the early 80's...when they didn't have dual pattern castings and wishing (price and availability wise) they did.