10.2 : 1 compression 360 at sea level. Options?

Knock sensors are piezo-electric sensors that respond to vibrations in a certain narrow frequency range.

All you will get is a quick electrical pulse out of them, so you would need a small circuit to detect a pulse over a certain level, and then 'latch' it (in the electronics sense of the word) to light an indicator. It could also be set to not latch in a fault (knock) on one or a few knocks, to avoid nuisance indications. So, yes, doable for sure.

Well lookie here: Caspers Electronics Knock Gauges 102003