Wavrdr: Your problem is the TPS. I had this exact same problem (a customer did also) when I did the SVT t-body upgrade. Check the wiring connection on the TPS plug or you could have a bad TPS sensor. Swap over your old TPS-they're the same.
Tom: I'm now converting 65mm to proper SVT spec./operation. E mail if you're interested. I order new 65er's, but I'll do a used 1 if you send it to me.
Still looking for 3.0 lower IM throttle plates! Who's gone secondary-less?