If you are looking for that much hp you are going to spend $3500+ to get there. Easiest for that money would be a super charger. Headers on a 4.7 are worth less then 10 hp. A Jet chip will not get you anywhere near the power levels you want. Best bet is to check into some of the Dodge sites, some of the best in the late model Dodge performance post on some of the sites.
A couple to get you started.