I bought a 73 Cuda with a 5.7 swap. It has a Silver Sport 4L80E trans. Engine is stock, but has a LS throttle body to operate a traditional gas pedal. Has an EZ Tune computer controlling the engine. Runs and drives great, most of the time. Always starts and shifts into gear when cold. However, sometimes after a drive if the car is shut off, when started again will stall repeatedly when you try to put it in gear. Literally, you need to rev it up and bang it in gear or let it sit. Since it's happens sporadically doesn't seem like the tune can change. I'm not a tuner so where should I look? The tune, ICA, or a sensor.