I thought that I would start a topic to show some of the work that has been done to install a 405 T16 engine in my 205. The car is still a work in progress - a few pics of the car before the work started are below (if I've inserted them right).
At the time it was a 205 1.9 GTi with a turbo technics upgrade that had been installed since the 80s.
When the head gasket went I had decided to rebuild the engine and install emerald/omex until I spotted a XU10J4TE for sale.