I am running two one inch spacers (one per 4 bbl) on my '27, and also have one on the 5.0 in my Jeep. I just felt it would get the carb up a little from the intake heat, and they also give me some clearance for the throttle arms and linkage.

I don't have any scientific proof they do anything like create a tunnel ram sort of airflow, but I have just always put them in.


Don