I've done an "O" to "IO" conversion twice, both using Bendix parts. Its not hard to do. Basically, you'll need to obtain the following:
1) Throttle body / fuel servo
2) Flow divider ("spider")
3) Fuel injection nozzle assemblies (4)
4) Fuel delivery lines (4)
5) Some way to adapt the throttle body to the sump. This may involve a different sump all together.
I don't know about doing the AFP system, but its reported to be very good. Should involve similar parts.
BTW - if you need the fuel delivery lines, I have enough stock to do about 8-9 airplanes. Lycoming sells them for $100 each and they're a "one size fits all" length. I make them up in my shop, to your exact lengths, at half the cost.
Bill