I found the LTCC installation instructions here. https://www.camaroz28.com/forums/lt1...ns-new-882760/

I noticed it requires the EST signal to function, as well as hi/low res signals. If it truly controls dwell by itself, then it would have no need for the EST signal at all. It probably takes the EST signal, measures the pulsewidth and stores it, multiplexes a pulse to the correct ignition coil driver and fires the coil at a stock pulsewidth/dwell time.

If I had to, at gunpoint, reduce the dwell time, I would send +300v to the primary of the ignition coils. Works for MSD. Or maybe just 24v. Lie once, cheat twice.

Oh, something else the LTCC unit does......flash codes with green light to identify failure conditions. Seems to complain if the key is toggled inside of 5 seconds for some reason. This is what I have been able to find out so far.