Good luck with the Spec - their quality is hit or miss, and not much in between.
You can certainly use the quick release quad without a pedal adjuster, but I'd recommend the firewall adjuster.
There isn't much difference between the blue 2 hook quad and the quick release. The ramp is a bit steeper, but not much. I have both, the 2 hook installed on the 01, the red one in a box. Tried both, difference was minimal, so I went with the 2 pickup just in case the other pickup was needed.