Pressure sender 30 psi, 240 ohm, 1/8" npt

This will replace the 387-30V2-C that has 2 terminals. One to ground the other to the gauge.

The 387-30V has just one terminal that goes to the gauge, the housing is the ground for the 387-30V. If needed simply use a hose clamp around the body and pinch the ground wire under the clamp.