I had a fiberglass hood on my 89 GT and the bodyshop installed the hardware from my original hood so it would close and stay closed without the use of hood pins. It worked just like the stock hood.
I think the horsepower gains from the supercharger are about the same for both cars. Ford over rated the HP on the 2001 Cobras and they under rated the HP on the 2003s. The stock FWHP for the 2003s is at least 425 and the RWHP is 360-380.
Thanks for the compliment you sent out to all the 03 Cobra owners. I've had mine about a year and three months now and love it. Why don't you join all of us and get one, we'd be glad to have you aboard.
Paul