Delco Remy Rebuilt Alternator 1105585, 120Amp, 4015, 12V, Neg. The Alternator was rebuilt May 2002, has not been installed since rebuild. 1105585 = Delco Remy part number. 120 Amp = 120 amps recharge 4015 = Build date of April 1, 1985, April fool's day. 12V = 12-volt system. Neg = Negative Very hard to find alternator.