A Coyote swap would run about $19k (if done right), but the whole point of this is - as you surmised - to be different from everyone else.
All good, and exciting, as well!
Exhaust and motor mounts: Any time you're doing a motor swap, unless it's a plug-n-play kit, you're going to run into fabrication. Exhaust is easy, and if you wanted to get REALLY trick (but pricy), Burns' Stainless sells oval-section tubing, where you could do a full-on side-exhaust without completely sacrificing ground clearance. I would also think really hard about your planned shorty/2.5" setup... You'll be leaving a lot on the table, particularly at the higher RPMs. Think more like 1-7/8" long-tubes, and 3" downstream to really let the motor breathe. Based on your costing, it sounds like you'll be getting some nice, free-flowing heads, and as we all know, the more radical the cam, the higher the rev range. I'd bet you'll exceed 100% VE with that intake setup; don't skimp on the exhaust and bottle up all that hard-earned power!
Motor mounts are fairly simple as well. A few pieces of steel, a bit of welding, and you can make bolt-up adapters to stock (or aftermarket) Windsor block mounting points. Trans crossmember could probably be the aluminum piece from FRPP, since you're thinking T56, and that's a known swap into the S197.
The rest - I'm a bit overwhelmed. The ISIS system sounds really cool, and that's the way I think I'd like to go eventually. But that might be beyond my planned budget for now. I will admit that the though of completely rewiring the car makes sense, it's - well - pretty darned scary.
Electrical is always the joker in the pack. I deal with it on a daily basis (wiring, fabrication, circuit design, etc.), so I've got a bit of a different viewpoint that most. I WILL say that electrical is one of those things that done right is a thing of beauty, and done wrong is a complete and total nightmare. Which ever way you go, take your time, do it right and clean, label the HELL out of things, and keep records! For a situation like yours, where you're ditching the PCM (and obviating the true functionality of a CAN-BUS OE style setup), I still think it'll be better for you both long and short term, to pop for something like the ISIS system rather than trying to cobble together what you really need while trying to work around the SJB and under-hood load center.
The distributed system concept is actually pretty simple. Put the power distribution where it needs to be, with the shortest possible runs and the lowest possible quantity of wire. Front power box would drive up to 8 circuits (assuming street car):
1: left turn signal
2: right turn signal
3: marker lights
4: headlights (possibly through a standard relay or two depending on load)
5: high-beams
6: starter "start" terminal
7: ignition coil power
8: horn
The rear box would also drive up to eight circuits:
1: left turn signal
2: right turn signal
3: marker/tail lights
4: brake lights
5: fuel pump
6: diff cooler fan and pump
7: trans cooler fan and pump
8: cool suit pump
The under-dash module, would then also drive up to eight circuits:
1: gauge power
2: blower motor feed
3: wiper motor feed
4: MSD box power
5: Data acquisition system power
6: Video record system power
7: Radio/Telemetry power
8: Cigarette lighter
Finally, a control module takes up to twenty-four switches as input information, mounted up under the dash. Each switch runs to a dedicated terminal on the box, where it's converted to data.
With the CAN-BUS setup, you run a short piece of wire directly from the distribution box straight to the desired piece of electrical hardware. A data cable strings the boxes together, and you just set up how each output channel behaves (always on, ignition switched, switch triggered either key-on or not, etc.) in a software GUI, then download it to the controller.
With an "old school" setup, you would run power to a central load center (fuse box), and then take the outputs in a spider-web up and down the length of the car... You'll also need a relay block to handle high-amperage switched loads, and those controlled by the ignition-on switch position. All in all, a LOT more headache, and a LOT more wire. Take the rear of the car as an example. Using my example of eight load circuits, you'd need the following:
1: left turn signal - 16ga wire from the flasher circuit
2: right turn signal - 16ga wire from the flasher circuit
3: marker/tail lights - 16ga wire from the headlamp switch
4: brake lights - 14ga wire from the brake pedal switch
5: fuel pump - 12ga wire, from the ignition switch, with a relay
6: diff cooler fan and pump - 12ga wire from either the ignition or battery, relay controlled.
7: trans cooler fan and pump - 12ga wire from either the ignition or battery, relay controlled.
8: cool suit pump -14ga wire from the battery, with a relay
So, for just the rear of the car, you'd be looking at a harness with three 16ga wires, two 14ga wires, and three 12ga wires. Add four 20ga if you intend to keep the ABS functional. This harness would be a minimum of 13' long, and would have "peel outs" across it's length.
In comparison, the ISIS setup would probably be able to drop a wire gauge size for each lead (less length means less voltage drop), and you would probably have 25' of wire TOTAL. Much cleaner, much simpler to wire, and a piece of cake to troubleshoot, since there are circuit status (on/off and fault) lights for each of the circuits.
COST: A 3-box ISIS rig would probably run under $2K for the hardware, and figure on 6-8 hours of labor for installation, and another 2 hrs for programming and diagnostics. Even with a "sweetheart" shop rate of $60/hr for labor, that's still around $2400 all in. With a traditional setup, you're probably looking at around 25-30 hours in labor for just the wiring hardware (load center, relay block, harness fabrication, installation of Deutch or Weatherpak connectors, taping, etc.), plus another $600 or so in hardware, not counting switches, which I'll get to in a moment. Figure on $2100-$2500 to go the "traditional" way. So far, it's a wash. If you want to re-use the existing SJB and fuse panel hardware and wiring harnesses, you'll save a bunch on the physical hard-parts, but you're going to spend a TON on wiring labor. Ford combined lots of their sub-harnesses together in some of the main trunks (think 1.5" diameter bundle, packed with 16-20ga wires!), so it's not uncommon to open up a harness and find THREE "grey with yellow trace" wires in there. To find the correct one of the three, you have to run continuity tests up and down the line... Hell, it took me over three hours to
de-content the underdash harness on my car, with the correct book, tools and knowledge, and that was after it was sitting on a workbench! If all you were doing was adding on an alarm, or something like that, it would be one thing, but with as many changes as you'll be making, it may make more sense to start clean-sheet, before you get eaten alive with labor time tracing down circuits and running logic tests to see how a circuit has to be modified to function properly.
From a fiscal standpoint, I would pick my path and commit now, before the build starts, and go from there. If you build a harness, and then swap over, you'll have essentially paid twice. The electrical setup won't make the car faster (+/- weight reduction/addition) but a no-start will certainly slow the car down...
Switches: I'm not counting the switches in the price, because with either the "old-school" or "modified stock" solutions, you're going to need roughly the same piece count and current capacity switches. With the ISIS setup, however, switch current capacity becomes a non-issue as they carry virtually NO current whatsoever. You could even re-use all the stock stuff, and let your imagination run wild. Cruise control on/off to start the car? Why not? You get the idea....
I prefer to keep the old-school analog gauges.
Copy that. Just trying to save some coin for the rest of the build.
Not keeping the A/C is no big deal, but I'd at least like to keep a functioning heater. I'm fine with the possibility of having to convert the heater controls into analog, and was in fact fab'ing up a new face plate so as not to be constrained by existing (useless) controls.
Upon further review, the ruling on the field has been overturned... A small bit of good news for you: While the HVAC system does tie into the PCM, I *think* that's for status and idle control only. It *appears* that the Climate Control Module is part of the switch assembly, and minimal circuit work will be required to get it functioning in a stand-alone mode. For the heater, you'll need to access the 26-pin connector on the back of the dash panel, C294A, and get start/run power to pin 14 (22ga wire, brown with a white trace), fused battery power to pin 26 (22ga, red with yellow trace), and I *think* that would be it. For the blower motor, you'd need to supply relay-controlled (and fused at 30A) power on the blower motor connector C2066, 12ga pink with white trace. The relay for that should be ignition-switched. If all of my assumptions are correct, the above will let you keep the entire stock HVAC system controls fully functional.
For the A/C system itself, you could use a relay on C294A pin 3, a 22ga grey with red trace, to drive battery voltage to the AC clutch itself. Take the output of the clutch and run it through the high- and low-pressure cutoff switches, and tie that to both ground and a linear actuator on the throttle linkage to get your idle bump-up when the clutch engages. I would also suggest that you set the car up to fire off the radiator cooling fan directly off the relay you added above. That way, when you hit the "A/C" button, the cooling fan kicks in, but the idle only bumps when the compressor clutch is engaged. Make sense? Personally, I would still skip the AC stuff completely. Talk about cluttering an engine bay! Compressor, lines, receiver/dryer, condensor, wiring, etc.
With the ISIS system, you could have an absolutely IMMACULATE engine bay... 8ga wire and a CAN-BUS cable heading to the power module hidden behind the headlight bucket on the passenger side. Alternator wire ties into that 8ga wire, and then you have a single 12ga lead running to the ignition coil. Possibly a small harness for the ABS stuff, but that could come up from underneath right in front of the HCU itself, staying essentially invisible. That would be pretty clean.
Finally, if I wanted a Coyote, I'd sell this car and buy a GT. After all, insanity can only be justified to a point.
Nah, insanity is in the eyes of the beholder. If ANY of us did only stuff that "made sense," we'd never take a car on track...