Well, while I'm waiting for other crap to happen on my current vector project these crazy boards arrived- all the way from France!

Drew, posting over on "the other site" has blazed this trail ahead of me (and itnis from him that I learned of this very cool project) and has documented his journey already.
As such, I will merely be regurgitating some of those those efforts mostly, but as I am trying to maintain the original CRTs and am working with items hopefully slightly improved because of his communication with the developers of these boards my project will wind up slightly different and I'll aim to go into more detail.
The gent I communicated with, Sebastien, has been excellent with his help facilitating this.
I was a bit concerned about sending so much $$ to the other side of the planet, to someone I don't know, in a country that was making it difficult to ship anything to me, but it turns out that this is a legitimate project run by brilliant and trustworthy fellow enthusiasts.
Per their recommendations, I bought parts for the PCs required to run these machines and as I get around to assembling them I will give some detail about them going together and how they work with these boards.
The idea is that these pcbs and add-ons (which they are developing for various original arcade driving machines) when connected to an original cabinet with a PC will allow the user to run practically any driving game you have seen, from virtually every platform you have used, and still utilize the forcefeedback, buttons, wheel, pedals, and shifter of that original machine properly.
There ARE limitations to this of course, as the realities of 270 vs. 360 games, shifter switch type differences, pedal styles, indicator light outputs, etc. cannot be ignored obviously, but the developers kept this in mind to add as broad an implementation as possible with what they built.
I am told that the user manual included on the hard drives I got with these happens to be in French.
This should prove to be an interesting one.