<<TURBO-SUPERCHARGER: Commercial trucks have done this... A
supercharger that spools a turbo.>>

Actually it's the opposite.

Detriot Diesel is just about the only  engine that required a blower to
function.
Intake is first, then exhaust.
The turbo spins as a result of the engine firing, the blower spins with
the starter.

And they added variables to this.
3-53, 4-53, 6-71, 6V-71, 6V-92,
8V-71, 8V-92, 12V-71, 16V-71.

All just with GMC blower's

Then they offered:
6V-92 T, 8V-71 T, 8V-92 T

Single turbo on top of the blower

And the last of the two stroke oil burner's was;

8V-92 TTA

Twin turbo's & after cooled.

The guys that go fast using Detroit's in class 8 trucks add a turbo to
every two cylinder's, after the blower, not before it.