DB Electrical ADR0335-C Alternator (For Chrome General Motors 110 Amp One 1-Wire 65-85) 100% New aftermarket unit built to meet OEM specifications 1-year warranty protects you after your purchase Factory direct pricing with no middleman markup delivers exceptional value Fits: Almost all General Motors engines from the years 1965-1985 and many of the later model engines also Specs: Output at idle(600 engine rpm) is 65 Amps. Full output of 110 Amps is achieved at 1200 engine rpms. 12 Volt, 110 Amps, 2 Inch mounting footwith 5/16 Threaded Adjusting Ear, One-Wire Alternator, Single Groove Pulley