I think if you could recon-tour the short turn on the Offy intake you would benefit more.
A longer more gentle turn would allow the air/fuel mixture to follow the short turn & feed the # 2 & # 5 cylinders a bit better.
By having a long gentle radius the air has an easier time to follow a gentle turn.
In turn it should increase airflow.
Just like having a long short turn radius in the intake port, it will increase airflow allowing the air to come into the combustion chamber throughout the whole diameter of the intake valve, & not the majority of the long turn radius.
The long turn radius still gets the majority of airflow, but having a good short turn radius helps tremendously for improved short turn radius flow.
For a turbocharged app, I would think it would show an improvement also.
Stock for stock, (turbo charged APP), I think a OFFY intake would work better because of the sharp 90 degree turn, most of the air/fuel will go to the outboard sides, but I think by all the air/fuel hitting that wall hard, it might break up the flow & possibly feed more air/fuel to the #'s 2 & 5 cylinders, just a thought anyways.
I think this intake is better than the Offy or Clifford.
http://www.ebay.com/itm/161462168269?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
But, I have not seen any back to back dyno/track or street racing comparisions.
MBHD