LS3 Swap, VSS, Stalling, speed control

Hi
I have an 2010 GM LS376/480 swap in my De Tomaso Pantera and need some guidelines. My ZF Transaxle have an output gear and I have mounted a Hall type sensor that put out 16000PPM, (I now that is to low), the ECU demand 128000PPM, but what will happens if I connect my 16000PPM sensor how will the ECU respond?
Anyone now the data for the input VSS signal to th ECU?
My wish is to get rid of the sometime stalling issues and install a speed control.
/Yngve
Sweden