Where is the oil pressure sending unit on a dodge 1977 360 power wagon?

The oil pressure sending unit on a 1977 Dodge 360 Power Wagon is located on the engine block, near the distributor. It's usually on the driver's side (left side, when looking at the engine from the front), but to be certain, you'll need to consult a repair manual or a detailed diagram specific to your year and engine. There's a chance it's slightly different depending on specific options and modifications. A picture would be very helpful in confirming the exact location if you have one.