Note that both kits are made for electric's, not nitro. The nitro boats are built to handle the power. If you must look at Peter's site then look at the Firefigher .12 , Tom Moorehouse's design.
Also keep in mind that there will be a lot of parts on your NH that you can't use so plan on unloading the hull and running hardware but at least you have something to work with.
I've got another link for you worth checking out: http://www.idmracingproducts.com/ .