Used GM Delco-Remy Alternator, casting #1100545. Unit is dated 3*D*4 (April 4, 1973). 32 Amp - 12V - NEG. Unit spins freely, but should probably be rebuilt. May be correct for Buick automobiles. One source shows correct for 1969 through 1975 Chevrolet Camaro, Chevelle and Nova. Tests good, but bearing makes noise. VGC! $35. Will ship!