Hi Dick,
That is very much how I did my OS 160FX with an additional horizontal shelf glued to the cowl to direct the air to the center of the cylinder and the port side was blocked and partitioned off. After reading a few articles I found that it is better to have a larger Plenum above the cylinders. I suppose it really doesn't matter that much in our engines and your baffles are better than most people would ever make.
I found one good link to full scale, still can't find the one where the guy was machining model engine heads.
http://www.avweb.com/news/savvyaviator/188945-1.html
You will need to register for free to view the link.