Having up close and personal experience with my currant V-10...there are 10 coils and you can be spending a fair chunk replacing those. Also, the sparks plugs are threaded onto four...FOUR threads, so years of cold/hot can loosen a plug and then you may have the joy of having the the plug shoot out and then the hole re-threaded. So..if I was to offer any suggestions..get a couple coils to have as spares, just in case. And have all the plugs replaced right after purchase and then do them say every 2 or 3 years. That way..you know they are tight. Because getting them re-tapped is costly.
Gary Haupt
