Anyone do a straight across swap,from ported factory heads,to worked W-2's?

Reading the last few responses confirms that my particular combo leaves a little bit to be desired. I often feel like the car should have been faster than 12.0 in the 1/4. It was mainly run in the 1/8 mi. so it may have been running out of breath with the 4.30s. It's a basic, no frills Duster though, couldn't have weighed much over 3,300. Really should have been mid-11s at least. What do I know though?

The .557 cam that's in there with valve lash comes out to less than .557" so it's probably a little small and probably not utilizing the entire flow potential of the heads. It's also got a 750 CFM carb on it, might help top end power a little to have more CFM. It's street driven though so it's fine. I have a hard enough time getting it in the ball park with the 750.

I will also admit that cylinder 5 is a little weak but not totally dead. Even so, seems to run OK when I can get a handle on tuning it and sounds great when you get over 6,500 rpm.

I do agree though that W2 heads are a very good design but maintain that if you have a well-ported set of conventional heads then you won't see a huge gain until you start porting the W2s. 300 CFM from conventional heads is huge and probably a max effort but 300CFM from W2s still leaves room for more. Plus like stated above, the design will have benefits over the stock architecture because you are removing the push rod pinch.

I'm not really sure if all this answers the O.P. question though. No matter how you slice it, W2s are a fairly large initial investment with all the specific parts. That also does not take into account whatever else might be needed to get a set of W2s working to their fullest potential. If you have a good running combo already the benefit would really be the untapped potential of W2s over factory heads. If you want to take the next step in performance, they are a good choice but a straight across swap with everything else being equal probably does not add up.