Should I Run A Carb Spacer?!

spacer on an AL carb is always a good idea, be it 1/4 or more. Even an aluminum plate with a large surface area helps like the cookie sheet ones under Quadrajets. The TQ's had a 1/4" fiber gasket and the phenolic fuel bowl to keep fuel temps low. Imagine the heat in a motorhome doghouse! Ford used a spacer as a vacuum take off for the EGR, plenty of them around.
plug port.....Most all performance builds dyno better with a spacer.