look over on for B bodies only.com lots of modern hemi stuff there and on for A bodies only .com..ur smart considering staying stock,,a complete donor with engine wiring and computer would be easy,, but rememebr ull need a high pressure fuel pump ,,and possibily a return for the injection,,,carn intake are out there and getting cheaper,,, after market electronics are getting a little cheaper,,but,, if u break down no dealership can fix the after market stuff,,

you stay stock,,,and keep the OBD2 u can go to any mopar dealer ship to trouble shoot,,,just my 2 cents,,,,