Search by number: 1991 Chevrolet Blazer 5.7L 8 Cyl Alternator ProAmp 8165-7 $105.00 each OPTIONS: w/AC 100 Amp ProAmp 7901-2 $137.00 each OPTIONS: Optional 124 Amp V3500 ProAmpN 8165-7N $98.00 each OPTIONS: w/AC 100 Amp ProAmpN 7901-2N $209.00 each OPTIONS: Optional 124 Amp V3500 ProAmp 7921-7 Call for Price OPTIONS: wo/AC 85 Amp 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