I have GM TBI injection on my 305 (not 5.0)..I mounted the O2 sensor too far away from the head and therefore need to go to a heated sensor. Question...any of you experts out there know of a Delco part number that will allow the heater to not be controlled by the ECM. I wish to simply run the heater off the ignition and my GM guy sez there is an application that worked in this manner. I know the later ones were controlled by the ECM and cannot take being hot all the time.