Small Block windage tray ?

They only show one windage tray for all. It is the first time I
have seen that the tray would increase crank case pressure.
The guy that wrote the book, has worked in the Dodge Motorsports
engineering department since 1989 Jim Szilagyi. Previous to that
he worked in developing high-performance and racing parts in Mopar
performance parts group. It dose say to use the tray in the 318 or
340 with stock stroke.