Kevin, the reason for the custom intake elbow (my own design) was two fold.
First, at the time, nobody built a 4500 flange dominator EFI intake elbow that could handle the full flow of the big accufab oval throttle body I wanted to use.
Second, nobody made an elbow that minimized intake height while maintaining that flow and I wasn't into the big hood scoop look.
So, I designed my own. It's 4500 flange on one side and Ford on the other...same flange pattern as 03 Cobra or 01 Lightning...and fits any of those throttle bodies. I designed it in mastercam and had it produced at a prototype CNC shop (not cheap).
I guess there was also a 3rd reason. Nobody made an elbow like that could accomodate a Ford IAC (idle air control) as most of the aftermarket EFI systems either don't use IAC or only support the GM sensor.
But anyway, back to your question on height. The total height of my Victor 4500 carb intake (converted to EFI but not height altered) plus my CNC'd elbow is *less* than a performer manifold + carb + filter, by a significant margin. Additionally, if you want shorter...you could use the same dominator intake, mill off at least 3/8" from the intake manifold, and at least 5/8" off the base of my intake elbow (it's a lot thicker than it has to be) making the entire package a full inch shorter than any 4bbl carburetor intake you might find on a cobra. You wouldn't have any problem fitting this under a stock hood. If you want it even shorter, use a performer or similar manifold, and now you're probably near 2" shorter than any comparable carb package.
The blower brackets I designed support the supercharger and a 3G alternator from a late model mustang GT (pre-2005). Nothing else. I use a Meziere electric water pump (wp337) mounted low at the radiator. No power steering. No other accessories. Anyway, these brackets are waterjet cut from 1/2" aluminum plate and the round stock (spacers) are all lathe work. I believe this bracket kit would fit in any make cobra, provided you eliminated the conventional cross bar and water tank and did something else (like I did). As far as air intake, you could put a filter directly on the supercharger, or duct it down to a filter, or put a scoop in the nose like I did...many choices, all of which fit under-hood.
The West Coast Cobra may have a bit more under-hood room, I'm not sure. I think the engine bay is the same size, but if you need a measurement or two, I can provide that, just let me know.
Computer is 5.0L Mustang GT (A9P I think, at present). Harness is custom made from junk yard harness parts as well as new parts from
www.fordfuelinjection.com
Cost? I know I have less than 10K in the entire engine including the fuel injection, and less than 30K in the entire car, but as far as a cost breakdown by line item...no idea. Depends on where you shop, how much you can do yourself, and how much patience you have I suppose. I bargain shopped for just about everything and took a real long time putting it together...hence the cost savings.