2 multi plugs, I use ford sensors( yes on a gm engine)mainly for oil, tach speedo,gas, water , volt are volts easy one there, gas sender, using a ford in tank mount( cut the tank in my car, to fit the ford intank system,,lucky same depth of tank, cutting the tank on a mustang to get the fitting ring parts/ mount on top of the tank. water temp, one for the ecu, one inline on a rad hose for the gauge