That´s a condence catcher cyclone.
They were all (except mine ) legally registered. We have a special "gengas-vehicle" category of registration here. BUT - light vehicles have to be 1975 or older and 2500+ kg total weight vehicles 1989 or older. That´s when emission bureaucracy started. This would allow me to do an -89 American pickup. The downside is that they all had carb or tbi at that time.
Yes, turbo seems to work good. However the Volvo guy told me his gasifier is sized the way that he doesn´t do idling at all.