You might want to look at the Flaming River brand stand alone 2 D cell battery powered timing light
Sorry I don't have a link for you, I carry one in the race car trailer and use it at the track, I do have older Craftsman dial back in that tool box in the trailer also but I don't use it on any thing with a race type ignition in the car, I've burnt more than one of them up using them on a MSD 7 series race box