Not Ranked
I don't want to start a big controversy as this may only pertain to places that get as hot as we do but if you decrease some of the stainless, cut back on engine "bling" this will help it cool better. These shiney items look good but have poor emmisive properties that tend to reflect infrared waves well.
Doesn't help fuel vaporization as much as a spacer would due to heat transmission through the intake manifold.
Wish I could help on a spacer source for you.
Jeff
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