I just got mine running too. Even when it ran 8 years ago the oil pressure gauge read low (except when cold). I suggest running a manual gauge and mount it under the dash. I want to have an auxiliary oil pressure, volts and maybe pyrometer gauges installed. A lot of the ground wires are black w/ yellow stripe. Check the battery ground wire at both ends VERY closely. This must be solid and secure. Start there. Cheersù Mar'