You need an EEC-V, for sure. Something out of a '96-97 Crown Vic, Grand Marquis, T-Bird, Mustang, Cougar, or Towncar. The harness from one of these vehicles will have the EV1 plugs for the injectors, built in EDIS8, and controller for any of the electronically controlled transmissions.
You could also run an EEC-IV and wire it up for EDIS8. With the right tuning software, you can enable EDIS (because the EEC-IV does actually support it). You'll need the EDIS8 module from a '93 Lincoln Mk VIII or similar vehicle. Then you could run a separate transmission controller from Baumann Engineering or something like that.
There's a few routes to go there.
'89 5.0L LX hatch: all 90mm 2.2L Blowzilla Dart Iron Eagle 306 @ 8.4:1, ported Vic Jr heads, TMoss ported GT40 lower, Deka 80# injectors, EDIS8, GUFB-A9L2-Moates tuned, Tremec 3550, 3.31 gears w/31-spline TruTrac
'66 GT 2+2 Fastback: carb'd 289, Canfield heads - EFI transformation pending
'71 Mach 1: totaled - R.I.P.