Light-years ahead of any competition at the time.
They were designed to be installed on pure stock engines, so their turbo was sized accordingly.
We've still got one complete kit on-the-shelf and we are the current caretakers of the LAST Pontiac Craig Hendrickson ever owned.
It's a 1976 Esprit with a 400 and a TurboForce kit installed.
Here's some info about the Esprit from Wallace Racing:
http://www.wallaceracing.com/TurboForce.html