Are there any such adapters out there or a manifold change would be required?

Thinking of it, would anyone do this? I have see several 240 guys switch back and forth depending on track type...but I think Evo owners are much more divded...drag racers and trackers alike.

 

You could get an adapter made. Talk to a machinist.

 

Shouldn't be too hard. There's a 9 second supra around here that constantly switches between 3 turbos.