waldo53.
Howdy, now you've put me on the spot and I have to agree with most of your reply! I think Woody is planning on more than a base 235, though. I think 2" pipe is fine for duals, but 2 1/4 or 2 1/2" would be better for a single pipe system. Bigger is not necessarily better, but it sometimes can be better. Lots of factors come into play in how an exhaust system works, but modern 4L engines tend to run 2" or larger pipe stock. A small increase in pipe diameter makes a big improvement in performance that you can feel with the systems that I have installed. I agree that dual 2 1/2" lines will be a waste of time and may even hurt performance! I believe that the "X" pipes will prove to be an asset to exhaust flow, and over time will become more and more common.
You are right, we aren't talking big blocks, which means small changes become more important.
Please keep your salt shaker handy when reading my opinions!
best wishes, Les
