One bit that I believe all will agree on .... be sure the plug cap is always pushed all the way on the plug, to where all of the hex part of the plug is covered. Some even use a small hose clamp around the base of the cap to insure it stays tight. Also, do everything in your power to protect the plug lead. Spiral wrap, split wire protectors, etc. A sharp edge on a cowl or the lead rubbing against anything will quickly abrade the shielding which can lead to interference, a dead engine or at minimum will cost $$ when a replacement is needed.

Good luck with your project.