Search by number: 1978 Plymouth Trailduster 6.6L 8 Cyl Alternator ProAmp 7505 $43.00 each OPTIONS: Optional 2-Groove Pulley 1/2 Belt ProAmp 7024 $49.00 each OPTIONS: Standard 1-Groove Pulley 3/8 Belt ProAmp 7509 $85.00 each OPTIONS: Standard; 100% New; 60 Amp; Universal 2 groove pulley ProAmp 7521 $149.00 each OPTIONS: Optional 100 Amp ProAmp 7509N110 $284.00 each OPTIONS: Standard; 100% New; 110 Amp; Universal 2 groove pulley ProAmpN 7509N $202.00 each OPTIONS: Standard; 100% New; 60 Amp; Universal 2 groove pulley Why is there more than one unit for my car? Look at the TECH SPECS when more than one unit is shown for your car. AMPS (ELECTRIC CAPACITY): must match you vehicle electric requirements. *** Call us if you are looking to increase your unit capacity! OE ALTERNATOR MANUFACTURER: It is recommended to match the Make of your alternator