Just bought a 5.7 for my Duster

I want to believe that this is an 03 hemi, and from what i've read its not the most desirable hemi to work with, Is this correct? Plans for this thing include

Replacing the missing throttle body (aftermarket i hear is useless) but i need one anyways
Going through the internals and replacing what is needed
Keeping the EFI and have it be more streetable (dont know anything about the wire harness mess or where to get it to keep the fuel injection) RECOMMENDATIONS ANYONE???
Swapping The cam and changing corresponding parts. I want something beefy RECOMMENDATIONS ANYONE???
Fix the broken fuel rail with aftermarket ones. (are these worth while to swap?)
Get TTI headers
Replace the serpentine belt system with something a little fancier
New plugs and wires (worth it???)
Either new Heads or Work done to mine RECOMMENDATIONS???

What else besides a supercharger/turbo/stroker can i do to it to gain HP??