Carb to FI conversion

[SlowMopar]

Hey some of you may remember me, it's been a while. I've also been Polara7777 on here. I just got a new toy and I have some questions. I have an 84 Tbird that was originally a 4 banger and someone swapped that out for a 5.0 HO with a carb. I'm wanting to swap it over to FI. I can have all the parts I want off of a older lincoln and I've already grabbed the upper intake, distributor, airbox and air intake, etc and I'm going back to get the rest of it. If I grab the computer, harness, and everything connected by wires or vacuum lines should I be set to go? I would think so but projects like this never go that smoothly. Any one have any advice on something like this? I thought about keeping it carbed but I don't want to dick with it and I also drive back and forth almost 100 miles a day so I want the FI fuel economy too. Also, I'm sure there is an ECU that would give me better performance than the one from an old lincoln. Does anyone know what year 5.0 has the best ECU? Thanks in advance, Ian