82-83 CAS Dizzy is going to be "easiest" [because that is what is most popular]. You need the Turbo one, the N/A F54 dizzy is the E12-60 unit.
You need an LC-1 Controller AND LSU-4 Sensor. [super cheap LSU-4 wideband sensor - go to AutoZone and look up a O2 sensor for a Audi TT, it's $55 8) ]
I've been having issues with my LC-1, I know for a fact XNKE had to get his replaced as well. I've just heard bad things about them. You might consider doing a PLX or other than Innovate controller, maybe do some google searching about it.
Now might be a good time to convert to one of your shaved manifolds, ported out to 60mm I went to a cable throttle setup, it's much more responsive than the mech linkage. Might consider it, plus that solves the "240SX TPS" issue.
I got my board assembled. I didn't have time to mess with it and I was frustrated dealing with other issues. If you do go pre-assembled, go with the V3.0 board, NOT the V3.57 - if something goes wrong on my main board,
A: I can't see it and
B: I can't fix it.
The 3.0 board has 'floating' components. If they burn out, you should probably be able to inspect them for damage.
Why do you want to mess with the stock harness? I feel that it's going to be a major headache, but I applaud your tenacity