Need to look at it to see where the system is at.
If backpressure is low
Then your not driving the turbo hard enough.
We use co2 on the external gates to achieve this not manifold pressure.
Anything can be made to turn including a g body
As far a a straight line.
The g body can shine above everything you listed
And be reliable.
My 1000+hp gn has been together for years