Tincup's 63 Dart w/5.7 Hemi
definately headers, and underdrive pulley, and some worked heads. if you become a member on either LXforums.com or chargerforums.com you can get some group buys on parts for the motor sometimes up to $100 off retail price.
i have a streetable sidewinder comp cam in my car but there is some major ones out there for like 399 for the cam. only problem is you need to replace the headbolts any time you take the heads off and also the suggest you upgrade to 6.1L springs in the heads. not a hard install to do and would be really easy with the engine out. i did mine with the engine in the car and it wasnt too bad