Do I need a new mechanic?

Hey Robb, I talked to a tech with Edelbrock about using an open or 4 hole spacer on the RPM Performer I'm getting for the 383 and his answer was no spacer required and may even hurt. I've used a 4 hole on a single plane manifold and it did help the bottom end (off idle) but won't be using any on the RPM.

Terry