Yes, that's why I said, "Depending on your air-cleaner setup and hood clearance,..."
Hood and air-cleaner clearance is a limiting factor. For some vehicles/setups, there IS room to add a thick spacer. On other applications there isn't.
I experienced similar conditions of boiling fuel and even vapor-lock as well. I added a thick phenolic spacer, a Holley aluminum heat-deflector plate and insulated fuel lines.
I also eventually added an electric fuel-pump with a bypass regulator and fuel-return lines.