Installing an electronic ignition involves working with some small hardware like the screws that hold the pickup plate in the engine. The first thing to check is that the screws are not bottoming out. An extra washer or two may be required in some cases.
The question is how tight do these screws need to be? If you're worried about them coming undone you can use some thread sealer AFTER you have fully checked the timing and the job is complete. Loctite make a weak sealer for small hardware (Loctite 222) that is great for this sort of work. Avoid damaging threads or breaking hardware by tightening them 'just enough'!!! Another tip - Don't use a high strength thread sealer designed for larger hardware.