How did you get the VR sensor to work? I've seen your posts on other forums about trying to swap the VR sensor for a Hall Effect one, seems you gave up and just converted the signal?
I am probably going to pull the trigger on a T56 Magnum kit in the next day or two and plan to use an Arduino card to feed a G3 PCM the vehicle speed over the CANBus network along with some cruise control instructions. The Arduino card doesn't appear to be able to accept the sine wave curve the VR sensory puts out so it has to be converted to a square wave. I've found several options, and a couple of fixes, but always curious how others have done it.
I know this is an old thread and it doesn't look like @GoodysGotaCuda has been back in a couple of years, but I figure maybe it is worth a try.