first off the wrap will rot your headers from the inside out.
Secondly what intake are you useing. Not that this really matters.I have ran both the offey and cliffords. And at one time had the carbs mounted with the bowl right over the center(3&4) headers tubes and never had a problem with boiling the fuel.
But anyway you can buy a heat sheild that goes under the carb.It is a thin sheet of alum.
And if you think about all that for a sec. Look at how close the stock intake is.. Not any closer then your headers are to the intake.