MSD does make a replacement opti, but it's pricey. If you maintain your stock unit as Goldmaster stated, you should be OK. Personally, I've replaced one opti with 186,000 miles on the clock. As for the LS coil setup, do a search for "LTCC" and you'll find some info. I know there's a website for it, but can't find the URL; maybe someone will jump in and post the URL for you.Naw I was just asking. I saw a Imp that needs a engine. Thats why i asked bout the other engine I just saw on another forum that msd make a water proof optispark unit and they said you can get a coilpack off a ls motor and delete the optispark. Has anybody heard of either of these before?