If I am not mistaken, to get it to run with the range disabler and the hardware removed, you would still need the old valley plate connected to the engine harness so the ecm would still think everything is ok. There was a guy on a ls tech forum that for $50.00, you could send him your ecm and he would disable the afm and mail it back to you. I used him a few times in the past since I didn't require a custom tune with a bigger cam. Keep us posted after you get it tuned.