I have an 01 blaster and I want to add a tach with shift light, I don't want a tiny tach! I've heard that you can wrap one of the wires around the spark plug cap and just ground it and it'll work but I don't want to order the tach without confirming it. As far as the lights on the tach I was just going to hook up to the head lights so it turns on when I turn on the switch. Would this tach work?? http://m.ebay.com/itm/361029642273?nav=SEARCH