I think that one needs the sender to work. If it didn't it would have at least 3 studs on the back......power, ground, and signal from the coil. I see only 2. Tachs are cheap enough (Super Tach II goes for about $ 40 new) so I see no reason to try to jury rig this one to work and maybe burn up a coil or ignition module that would cost more to replace.

Don