Fitment Guarantee·Free Shipping $50+·Hassle Free Returns
4.9· 19,069 customers|Fit guaranteed
4.9from 19,069 verified customers
|"Perfect fit, exactly what I needed!"— John D.
ACDelco®Verified to fit 683 vehicles
| Vehicle | Trim | Engine | Notes |
|---|---|---|---|
| 1978 American Motors Gremlin | — | L6 3.8L | with Ford Alternator; Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
| 1977 American Motors Hornet | — | L6 3.8L | with Ford Alternator; Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
| 1977 American Motors Hornet | — | L6 4.2L | with Ford Alternator; Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
| 1977 American Motors Pacer | — | L6 4.2L | with Ford Alternator; Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
| 1977 Ford Maverick | — | L6 4.1L | Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
| 1976 American Motors Gremlin | — | L6 3.8L | with Ford Alternator; Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
| 1974 Mercury Comet | — | L6 3.3L | Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
| 1973 Ford Bronco | — | L6 3.3L | without Air Conditioning; Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
| 1973 Ford Country Squire | — | L6 4.1L | Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
| 1973 Ford Pinto | — | L4 1.6L | Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
| 1973 Ford Pinto | — | L4 2.0L | with 5 O'Clock Plug Position; Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
| 1972 Ford Country Sedan | — | V8 5.8L | Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
| 1972 Ford Country Squire | — | L6 4.1L | Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
| 1972 Ford Country Squire | — | V8 5.8L | Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
| 1972 Ford Custom 500 | — | V8 5.0L | Unit MFR FO; Remanufactured; Regulator ER; Pulley 1V; Fan EF; Family FO-1G; Clock 4:00; 55 Amp |
WARNING: Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead, known to the State of California to cause cancer and reproductive harm. Service the vehicle in a well-ventilated area, wear gloves, and wash your hands. See www.P65Warnings.ca.gov/motor-vehicle-parts
Guaranteed fit — or free return
Currently out of stock
If a part we confirmed for your vehicle does not fit, we cover the return shipping and refund you in full. That is the fitment guarantee.
Nobody likes buying a part that turns out to be wrong. So if it doesn't fit, send it back for a full refund at no cost to you — return shipping is on us — and we'll help you get the right one.
Every part is covered for 24 months. Many brands add their own manufacturer warranty on top.
Ratings come from verified AutoBuffy buyers after delivery — no imported or paid reviews.
We do not list every part on earth — just the brands automakers actually trust. And we use AI to double-check not just the fitment but the product details on every listing, because we hate buying the wrong part as much as you do.
Top curated brands only
The brands automakers actually put on the car. No white-label mystery boxes.
We're obsessed with fitment
Year, make, model, trim, engine — plus the fine print most sites skip — so it fits the first time.
Search any part number
The number off your old part, a competitor listing, or the dealer part — we cross it and confirm the match.
ACDelco Alternator 334-2091
Out of stock · guaranteed fit or free return
Call for Price
888-477-2530Our parts specialists are ready to help you find the best price.
Call for Price
888-477-2530Our parts specialists are ready to help you find the best price.
Shipping calculated at checkout · Est. arrival Sat, Oct 24 to Sat, Oct 24
Ships To:This ACDelco automotive component is engineered to meet or exceed OEM specifications for reliable performance and long service life.
Trusted Automotive Brand
ACDelco is a trusted manufacturer of quality automotive parts.
View all ACDelco productsThe ACDelco Alternator (334-2091) is a direct-fit replacement for 1963-1978 Ford, Mercury, Lincoln and 1 other make. UPC 707773051542.
Alternator
The ACDelco Alternator (334-2091) is a direct-fit replacement for 1963-1978 Ford, Mercury, Lincoln and 1 other make. UPC 707773051542.
This ACDelco automotive component is engineered to meet or exceed OEM specifications for reliable performance and long service life.
We only sell brands automakers trust, and we double-check the fit on every listing.
Top curated brands only
The brands automakers put on the car.
Obsessed with fitment
Year, make, model, trim, engine, plus the fine print.
Search any part number
Your old part, a competitor, or the dealer #. We confirm the match.
Shop owner? Get BuffyPro business pricing
Fitment Obsessed
Every part checked against your exact year, make, model, trim, and engine.
Wrong Fit? On Us.
Free return shipping, no restocking fee — the fitment guarantee.
Brands OEMs Trust
The names automakers actually put on the car.
Millions of Parts, One Promise
If we say it fits, it fits.
