Spaced out: divided or open

I'll add to the confusion....On my current 410 stroker I run a 1" 4 hole tappered spacer on top of a 1/2" wood open spacer...all on a Victor intake. It works well for my application.

My previous 360 motor liked 1/2" open wood spacer with a 1/2" nitrous plate above it....all that sitting on a RPM Air-Gap intake. Again, it worked well for my specific application.