Anyone running a spacer and what differences did you notice with it?

I am thinking about adding one to my 93 Chevy pace truck

 

Id suggest to you to experiment with them, dont bother buying one, make one, use HARD WOOD
youll be able to tell a hard wood by pressing on it with your nail, soft wood will yield, the hard wood will feel like rock
i know this sounds kooky but hotrodders have been making carb spacers out of wood for ages
make a few of different sizes and then go to the track and swap em out see if you see any difference in MPH

 

Thanks Pablo