I ordered some spacers for my small block MOPAR and instead of the open plenum I accidently ordered the 4 hole (See Attached). It's a street engine with an Edelbrock Thunder series 650 carb with a performer intake. I'm trying to achieve the proper height because they are going on my 71 Challenger with a Shaker hood. Because of their price I want to try to make the correct decision first because if I experiment then I can't return them.
The main question - Will I notice a difference if I use them or should I send them back and get the one hole? Returning them is no problem they told me they will just exchange them. What are your thoughts? Thanks