Only thing I worry about is overheating the header. I like the idea of having the inside and outside of the header coated with some sort of insulation like the jet hot coat. I have the wrap still laying around in my house. When it gets warmer I am probably going to put it on.
BTW has anyone else noticed a VERY RAPID degradation/rusting of your dip stick sheeth? The heat from this tubular header really screws it over.