phenolic vs wood carb spacer

^^ Not to mention termites!!

I have seen quite a few racers at the track, most of them running custom sheet metal intakes, that are using wooden spacers. Probably because they can customize it quicker for their size & need. Idk.
For a street car however I'd rather use a phenolic or even aluminum spacer. I honestly dont know how they compare to wood as far as heat transfer & dissipation.