76 280 spark plugs?

^^^^ What Dave said! He forgot to mention the best part -- that it's absolutely free, provided by another Z enthusiast.

And if you want to feel especially cool, search out a printed copy of the FSM on eBay or Amazon. You'll pay about $80 for a gently used copy or less for a copy like mine. As with heavily used textbooks, a rough copy is often sprinkled with helpful notes. Mine even has helpful articles stapled into the pages. I got mine for $25. The downloaded version is also helpful, BTW. I can consult that while sitting at my computer. The paper copy is for spreading out in my work area in the garage.