I've been reading today that early 164 2.0L turbos used the same 2.0L 16v turbo Lampredi engines as the Q4/Grale. Spotted a pic of one in this book:

[ame="http://www.amazon.co.uk/Alfa-Romeo-High-performance-Manual-Speedpro/dp/1845840194/ref=sr_1_1?ie=UTF8&qid=1329597601&sr=8-1"]Alfa Romeo DOHC High-performance Manual (Speedpro) (Speedpro Series): Amazon.co.uk: Jim Kartalamakis: 9781845840198: Books[/ame]


and it appears to have a distributor hung off the end of the inlet cam. Has anyone got any more info about the engine in this installation?