What difference does it make, on a turbo car?

Just thinking this, as the one I got for my V8, and for most cars really, are really big fuckers, then the inlet runners, then the engine.

But then I was looking at Stevie Ross's supercharged LS1 Granada on the cover of Retro Ford, and frankly, it has NO plenum at all.

Got a big 4barrel carb type inlet manifold, then a little 90deg elbow on that, then the throttle.
No plenum at all.

That would suit me just fine as my plenum is massive and gets in the fucking way, but thought you needed one.

So, whats the crack with em?

Stevie?