mine was fine at idle but was glowing red at raised rpm. i had the carbs professionally setup on the dyno at ATSPEED in essex last week and you could clearly see the carbs were quite badly underfueling at raised rpm from the afr read out. now that they are setup the manifold doesnt get half as hot as it did.
i do recall them using a laser thermometer on the manifold a various stages to check the temp.
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