That's basically the layout; the coolant overflow and a couple other things going into the trunk to open up space in the engine bay, the IC flat over the area between the rear wall of the cabin/intake manifold/left strut tower/fuel filler area (i.e. above the trans), no AFM (aftermarket ECU) and air filter in the trunk (direct to turbo inlet). The IC is too big to fit down into the space by the trans (where yours is) so it will be by the items listed, putting it a little above the height of the stock engine lid. Some ducting and a strong electric fan (Spal) on the IC to get cool air across it, like you said with the space opened below. Another fan in the trunk to draw hot air out the opened panels and through the back (open taillight panel). Hopefully that takes turbo heat away from the rest of the engine. A bit more to it but that should give the idea. Eventually I can take some pictures but for now I'm still fabricating things.
Fortunately my smaller workshop is air conditioned so I can do some work during the summer months. Unfortunately however, it is too small to put the car inside it. I use it for fabrication projects, small parts rebuilding, etc. So last night I put together a new exhaust flange for the turbo's exit (replaces the stock UT cast housing). This bolts to the turbo where the exhaust turbine dumps out and the internal wastegate opens (first pic below). On the stock cast part (UT) these are basically combined into one open chamber, then routed straight down. For my 1500 application I wanted it to aim about 45 degrees rearward so the downpipe can be a direct straight path through the gap between the rear-suspension cross-member and the trunk floor (where the stock exhaust pipe passes on some versions of X). That panel has been opened up so lots of room for the downpipe/exhaust. I also wanted to try and separate the two ports from the turbo's turbine and wastegate to improve flow. Then merge them gradually a little further down the pipe. I was limited at how much that could be accomplished but I think it is a bit better than stock.
Turbo exhaust turbine exit and wastegate (still need to do a little porting to these):
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Started with a pattern from the turbo and a piece of steel plate (not using stainless to make it easier to do, more on that later):
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A few cuts to the plate:
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Then started attaching the tubes (some welding/clean up left to do yet):
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Ideally I'd like to have used a more gradual bend starting a little further away from the flange but the AC compressor is right there, so had to compromise. This is still a smoother radius than the stock one. Also these tubes are considerably larger diameter than the stock ones. According to what I've learned, separating the two exhaust paths (turbine and wastegate) at their exit points will significantly improve flow rates...kind of a mini-header I guess.
It's difficult to tell from this, but the tube is positioned to aim back toward the rear of the car, just under the trunk floor. The "downpipe" from here will connect directly to a flex joint, small muffler, and the tip (have a neat stainless tip that should look great coming out the center of the rear panel). The turbo should muffle things enough that a straight-through muffler will be good. This way everything is a direct shot from the turbo flange all the way to the tip at the back. Should be decent exhaust flow, just hope it isn't too loud.