So nobody has knows much about the circuit board thus far..
I see no reason why this wouldn't work. The speedo would be off a bit no doubt; I plan on fixing that by placing the needle right around 82mph when I hit 80mph on the highway. That will spread the inaccuracy equally amongst the entire speedo band. My speedo is already off that much from the Mac gauge's I put in ages ago.
As far as the boost gauge, it will likely do nothing. From what I hear, there is a vacuum line attachment that must be connected for that gauge to work. I don't mind sacrificing the volt gauge since it is worthless anyway.. how often do you guys even look there?
The 04 Cobra redline is closer to the GT than the 01 Cobra was (shows red at 6500 for 04). I have driven my car enough times to know the true redline, so no worries there. Some guys here have those ebay indiglo gauges that have a jacked up redline too.. I even had them once.
I suppose I'm just sick of the aftermarket gauges I've seen, and want to try something different. I really like the titanium faces and large font on the new Cobra gauges. If anyone knows much about the circuit boards, I'd appreciate any info. Otherwise, I'll keep you guys posted on my success