I've been directed your way as I am collecting parts to build a small blow through turbo on my bus and I believe there is some good knowledge/experience kicking around in here?
I'm Iain and I drive a 67 Brazilian 15 window hence the username. I restored the bus a between 2008-2012 after I imported it from Uruguay to the UK and it was badly damaged in transit. Since then I have lowered it on a 4" narrowed beam, fitted a bug box in the back with a straight axle kit and it is running a 1641sp on a single carb. It's rolling on 66 beetle steels which are banded 2" at the rear.
