Time for the boat anchor to land in the ocean....
On a serious note:
I'm pretty sure GM DID make 2 different systems and you need ASR in order to keep your abs. This is because the ASR system uses 4 sensors where as the non asr uses 3 sensors for wheel speed. So pretty much, you need ASR to have ABS in an ASR equipped car. This is LS1 stuff, but I believe it's the same on the LT1 ASR.