There are newer, more sophisticated knock sensors these days, but a GM knock sensor and module (what the FAST was originally designed to work with) just aren't good items to have in many applications. Solid valvetrains, forged pistons, and loud exhaust systems often throw this particular sensor for a loop.
Because the current ECU design has a limited amount of I/O, the knock sensor was removed as a feature from the sequential systems. Most sequential systems are on race engines burning very high octane fuel as well. So by the time a GM knock sensor actually detected true knock with 110 or higher octane fuel, it's probably too late anyways.
I'd look into the J&S Safeguard setup. Seems pretty cool.