I have a 1988 5.0 with EFI installed in my 1967 (I converted to MAF, so let's call it a 1989). I'd like to see what the sensors are doing, if the ecu coolant sensor is picking up the correct sensor, and if the VSS Is reading anything at all, etc, etc. What is the best way to do this? Is my only option a Tweecer or something comparable? Thanks!