Yeah i found the 222D guy. Big project that one! I love it when people do stuff like that but i think you build a car that would be just as competetive without all the surgery.
I also found these guys in Estonia who have built probably the most viable AW11 gravel car I've seen yet. It's a converted Ice racer but it seems to go pretty well and looks awesome.
https://www.youtube.com/watch?v=LOtOOjr277c
https://petrolicious.com/articles/to...nian-rally-car
Your dead right on engine choice, that's exactly what we were thinking. Find our feet with the 4age for a year or two and then up the CC's but stay naturally aspirated for exactly the reasons you've stated.
I had a little email exchange with the guy who runs TTT sussing out some parts but I think I've decided we will need to make everything from scratch. it's way cheaper and with the static ride height we're trying achieve anything close to a stock length TCA just pulls the camber really positive.