great job Danny, you're a great guy! maybe i should do the same to one of my M42! however i would ask you few questions... have you ever thought of modifying the timing by moving sprockets on tapped holes? by retarding valve opening the engine can help the turbo filling better the combustion chamber.
then, do you really need an RRFPR pressure regulator or you can do the same with a normal pressure regulator attached to the aspiration of the turbo?
last question is about the brake booster, running in turbo configuration you remove it or it works fine anyway?
hope you can understand, i'm italian and my english is not so good, expecially when talking about such techinical things!