[FIA-ERA]

Thanks for the replies. It doesn't have any provisions for a solenoid of any kind, just all mechanical. I've heard of "Jones Mechanical" as they used to make gear drive tachs way back. So one told me it was developed to get around a rule book for only using a 9" Ford rear end at the track. It's just a really neat piece and looks new on the inside. It would be great in an old rat rod or something where you could see it. I think it would hit the top of my trans tunnel in my 66 Mustang. Thanks, Matt