What are you talking about? 5k (or whatever the h.o. system costs) is just chump change, you don't need to research something like that before buying .
Seriously though it looks like a good kit, but I think that (on this site anyways) people prefer the Procharger as far as centrifugal chargers go. I doubt that helps you very much though, and hopefully someone that actually owns a Vortec kit can help you.