I've never ever ran any sort of insulation unless it was on originally from the factory on a stock hood. You don't need to and a stick on one? That's asking to fall down on the motor while you are driving one day.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.