dump the Hennessey crap and get a real roe kit instead, Hennessey is a sticker and some flea market add ons, probably just a k&n filter with stickers, standard ebay upgrade
The vast knowledge of a two-month VCA member.....
The 500 package is, as stated above, something you can see with the exception of "fortified valvetrain" and "high flow intake". If it has any one of a number of aftermarket rockers (easy to see with the valve covers off) that's good. You'll likely never know about the intake until you take it off and mic it to see whether its been opened up. Doubtful that this was done since its important to do that as a match with any porting on the heads (which isn't even claimed in the package).
The 500 package seems to be an expensive set of bolt ons for 60 HP. Good thing someone before you paid the $10 large for it, now you get to enjoy the car without having to pay that premium.