I'll put in a vote for an HEI conversion. This topic has been beat quite to death but the reasons being are reliability, affordability of parts, and size of the system. There is no ballast resistor to go out, the HEI modules are cheaper than any mopar ECU, and the output is higher, longer, and more stable. If you've got a V8, this is a sweet setup in my opinion: http://www.designed2drive.com/
PS orange boxes (new ones) have a reputation for failure...i won't trust em!
