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1) Yes, I would have preferred mounting the remote TFI over on the inner fender like the factory did. That was my initial intent and I acquired the harness bits from the '93 donor truck to do so. But doing so would have meant opening up more of the harness loom and making more cuts into the harness; I wanted to limit that as much as possible. Doing it as I have was the best compromise.
2) The only part that was a bit of a head-scratcher was the GND connections. You've got three of them coming out of the closed-bowl distributor quick-connector that are all common (2, 3, & 7 in the diagram above). I connected them a little different than the diagram... I connected the bare GND wires that ties into the shielding wrap on both sides along with pin 3 out of the distributor (the 3-way splice done with the blue Posi-Twist). #7 from the distributor I spliced into the #6 TFI (IGN GND) circuit (all orange wires). This thread talks a lot about this exact issue and potential "ground loop" problems. I think in may be more theoretical than an actual problem. https://classicbroncos.com/forums/sh...d.php?t=197853
3) I'm going to wrap everything up you see in the pics below for a cleaner install and to take any strain off individual wires - just wanted to get a couple pics for documentation purposes.
4) Color consistency of the wiring between the original '91 and '93 donor (distributor harness clip) made things a little easier and reaffirmed that my splices were correct.
Reading up on Ground Loops a bit, I think I could easily "fix" this potential issue by simply disconnecting the bare GND wire which is connected to the inner fender by the PCM on the stock '87 - '91 configurations. This is the circuit I mentioned in #2 comment above, identified by the blue Posi-Twist connector in the pics above. The circuit would just be grounded at the distributor itself only.
That makes things closer to the conversion schematic in post #15 above, except I spliced #6 from the TFI directly to #7 on the distributor, as mentioned previously.
A few trips under my belt, the truck starts and runs better than it has in quite awhile. In hindsight, I think I had a marginal PIP for quite some time which was causing hard-starting and stall after start. I think towards the end it also may have been taking out TFI's.
Of course I could have replaced the PIP in the original distributor and achieved the same result in the short-term, but I've been wanting to upgrade to the '92+ closed-bowl distributor w/ remote TFI for some time now. I'm glad I held out and did the upgrade.
I haven't done anything about my potential ground loop due to the double-grounding of the shield-wire. For now, I think I'll leave it alone.
I done this to my 89 F250 before I replaced the engine bay harness with a 92 harness(89 harness was a butcher job from PO). I just grounded the bare ground to the TFI modual mount and had no issues. That is a shield wire to help keep ignition spikes from radiating out causing issues to other electronics(radio)
Some of the buggies I made I did not even use that shield ground and they ran fine.
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