boost

Tripped across this image. Anyone have background? Interesting jackshaft use to simplify it. :unsure:

Hey all, I’ve recently turbo’s my 1995 Mustang GT on a blow thru carb setup. I’m running into a pretty serious problem. I hear the turbo spooling, and can physically feel the difference in power, yet my boost gauge reads 0. I’ve already tested my boost gauge with an air compressor so I guess...