Been sitting for 4 years and only has 35,000 miles. Started right up after putting gas in the tank and been driving it the last week. Runs fine but replacing the maintenance items. Which spark plugs to use? Keeping it original so only AC Delco. Choices are the standard copper plugs, Rapidfire at twice the price or platinum at almost 4 times the price. Don't care about the cost but heard on some engines that the plain coppers run better than the more expensive types.