I confiscated this out of my dad's garage years ago.. He must have bought it in the late 60's or very early 70's. It was in a box in his garage for a song as I can remember. There is a sticker on the top for 6 cylinder use. I don't know how to test it and I don't have a 6cyl anyway. It's in pretty nice shape for the age. The backside where it says MADE IN THE USA has a scratch or 2. The front outer edge has a knick in it. So it's NOT 100% perfect. THE BEAT UP IRIGINAL BOX IS INCLUDED. $110 SHIPPED IN THE LOWER 48 US STATES. PAYPAL IR MONEY ORDER. THANKS, Brian