I believe that it is a tach for an early A-body, probably a Barracuda, but will fit any 64 or 65 A-body car. It mounts in a remote location to the left of the steering column. WIW?? Those are a pretty valuable item, probably would fetch at least $200 if in working order, maybe more but I am erring on the side of caution in these turbulant economic times. Nice find though, and looks to be in very nice condition!!! It may also be correct for early B-bodies, but would need the console mounting bracket to install. I am not sure, but I think it may be missing the mounting bracket for installation into an A-body also. Good luck with your project, Geof