I think the most straightforward way to convert is to buy a complete kit as others have mentioned. It's all in one box.
If you want to piece something together and are comfortable doing so, you could do the ford conversion pretty inexpensively if you know someone who can machine the mopar distributor to accept the ford TFI trigger wheel and hall switch. I tried to contact the guy that did the mustang FI conversion on his small block from here but he never responded to his thread or PM's. I ended up selling all my small block distributors and ford TFI stuff to another member on this board, but I don't know if he ever got around to doing anything with it.
If you are really comfortable with doing your own thing, megasquirt is another option, but you are on your own with everything other than the actual controller and software.
There are sequential systems out there for sale (BS3, haltech, FAST, electromotive, etc.) but I doubt if there will ever be a specific (bolt on) one for a mopar. Most of the sequential systems are pretty expensive (except for maybe the BS3).
IMO I don't think there are more than 10 members on this site with big or small blocks (not including late model stuff/swaps in any form) that are converted to fuel injection.