Mine works fine to my 12volt source I had to the carb choke.
I'm gonna attempt to take mine to a cruise tonight.
I put a tach filter on it and so far it reads fine. We shall see. I got a tow rope in the trunk just in case. This is thanks to larrymopar360 sending a PM to the guy who mentioned it on the dippy site he provided. That guy sent me an email and I luckily found one at a performance shop that had them in stock.
https://www.summitracing.com/parts/cin-sn20Thanks again. Everyone