Accu-Drive Gear Drive Big-Block Chevy (7891)
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Compatibility
- Platform
- Universal
- Vehicle-specific fitment
- Review application details below
- Need help?
- Confirm fitment with us before ordering — (714) 202-7886
We list the engine platform a part is built for. That is not year-and-trim application data, so it does not confirm a fit on your specific vehicle.
- Est. install labor: 6.0 hrs — $750 at $125/hr. Pick Install at HRC and a 20% labor deposit ($150) is due at checkout; the balance is due at completion.
- An estimate for a stock vehicle, not a quote — we confirm it in writing when you book, before any labor is authorized. Seized hardware, prior modifications, diagnosis and machine work are quoted separately; tuning is arranged through our tuning partner. Questions: (714) 202-7886.
- Warranty & track disclaimer — read before you race it.
- Shipping & returns — rates and RMA terms.
- Installed in-house in Huntington Beach, CA — labor & service policy.
- Affirm and PayPal available at checkout.
More ways to pay at checkout
Edelbrock part #7891 Accu-Drive camshaft gear drive kit for big-block Chevy engines replaces a stock timing chain with a precision gear drive system utilizing a compound gear drive train. The gear drive can be easily installed. Just replace the stock crank and camshaft sprockets with Accu-Drive gears and slip in the idler assembly. Most Accu-Drives require no modifications to the engine block, although some fitting of the axles and front cover may be required. This Accu-Drive camshaft gear drive kit for big-block Chevy engines transmits power from the crankshaft gear to a full floating main idler which drives the camshaft gear. A unique feature of the Edelbrock Accu-Drive system is the ability of the main idler gear to float to an optimum position between the crankshaft and camshaft gears, assuring absolutely equal load sharing between the crankshaft and the camshaft gears. The gears are made from billet SAE-1144 steel with induction hardened teeth. Gear teeth are shaved for precision operation. The set features hardened and ground idler pins from billet steel and are compatible with all standard camshafts. Features Include: - Accurate timing control..No chain to stretch - Provides multiple cam timing adjustments for optimum performance - Smooth cam rotation for precise valve timing
| Part Type | Engine Timing Camshaft Gear |
|---|---|
| Color | Satin Steel |
| Inside Diameter | 0.751" |
| Thrust Bearing Included | Yes |
| Tooth Width | 0.1534" |
| RGL | WARNING: This product can expose you to Chromium, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov. |
| Keyway Notch | Yes |
| Sprocket Type | Gear |
| Adjustable | No |
| Diameter | 4.954" |
| Thickness | 0.585" |
| Mounting Hole Quantity | 3 |
| Outside Diameter | 4.954" |
| Tooth Quantity | 48 |
| Chain Included | No |
| Material | Steel |
| Mounting Hole Diameter | 0.399" |
| Weight | 4.45 lb |
| UPC | 00085347078912 |
| Country of Origin | USA |
Verified fitment · 688 applications
- Chevrolet Bel Air (1971–1972)
- Chevrolet Bel Air 6.5L (1965–1969)
- Chevrolet Bel Air 6.6L (1971–1972)
- Chevrolet Bel Air 7.0L (1966–1969)
- Chevrolet Bel Air 7.4L (1970–1975)
- Chevrolet Biscayne (1971–1972)
- Chevrolet Biscayne 6.5L (1965–1969)
- Chevrolet Biscayne 6.6L (1971–1972)
- Chevrolet Biscayne 7.0L (1966–1969)
- Chevrolet Biscayne 7.4L (1970–1972)
- Chevrolet Blazer 7.4L (1973)
- Chevrolet Brookwood (1972)
- Chevrolet Brookwood 6.6L (1972)
- Chevrolet C10 7.4L (1975–1980)
- Chevrolet C10 Pickup (1970–1972)
- Chevrolet C10 Pickup 6.5L (1968–1969)
- Chevrolet C10 Pickup 6.6L (1970–1972)
- Chevrolet C10 Pickup 7.4L (1973–1974)
- Chevrolet C10 Suburban (1970–1972)
- Chevrolet C10 Suburban 6.5L (1968–1969)
- Chevrolet C10 Suburban 6.6L (1970–1972)
- Chevrolet C10 Suburban 7.4L (1973–1980)
- Chevrolet C20 7.4L (1975–1986)
- Chevrolet C20 Pickup (1970–1972)
- Chevrolet C20 Pickup 6.5L (1968–1969)
- Chevrolet C20 Pickup 6.6L (1970–1972)
- Chevrolet C20 Pickup 7.4L (1973–1974)
- Chevrolet C20 Suburban (1970–1972)
- Chevrolet C20 Suburban 6.5L (1968–1969)
- Chevrolet C20 Suburban 6.6L (1970–1972)
- Chevrolet C20 Suburban 7.4L (1973–1986)
- Chevrolet C30 7.4L (1975–1986)
- Chevrolet C30 Pickup (1970–1972)
- Chevrolet C30 Pickup 6.5L (1968–1969)
- Chevrolet C30 Pickup 6.6L (1970–1972)
- Chevrolet C30 Pickup 7.4L (1973–1974)
- Chevrolet Camaro (1970–1972)
- Chevrolet Camaro 6.5L (1967–1969)
- Chevrolet Camaro 6.6L (1970–1972)
- Chevrolet Caprice (1971–1972)
- Chevrolet Caprice 6.5L (1966–1969)
- Chevrolet Caprice 6.6L (1971–1972)
- Chevrolet Caprice 7.0L (1966–1969)
- Chevrolet Caprice 7.4L (1970–1976)
- Chevrolet Chevelle (1970–1972)
- Chevrolet Chevelle 6.5L (1966–1969)
- Chevrolet Chevelle 6.6L (1970–1972)
- Chevrolet Chevelle 7.4L (1970–1973)
- Chevrolet Chevy II 6.5L (1968)
- Chevrolet Corvette 7.0L (1966–1969)
- Chevrolet Corvette 7.4L (1970–1974)
- Chevrolet El Camino (1971–1972)
- Chevrolet El Camino 6.5L (1966–1970)
- Chevrolet El Camino 6.6L (1970–1972)
- Chevrolet El Camino 7.4L (1970–1975)
- Chevrolet G10 Van 7.4L (1973–1974)
- Chevrolet G20 7.4L (1976)
- Chevrolet G20 Van 7.4L (1973–1974)
- Chevrolet G30 7.4L (1975–1976)
- Chevrolet G30 Van 7.4L (1973–1974)
- Chevrolet Impala (1971–1972)
- Chevrolet Impala 6.5L (1965–1969)
- Chevrolet Impala 6.6L (1971–1972)
- Chevrolet Impala 7.0L (1966–1969)
- Chevrolet Impala 7.4L (1970–1976)
- Chevrolet K10 7.4L (1976–1980)
- Chevrolet K10 Pickup 6.5L (1968–1969)
- Chevrolet K10 Pickup 7.4L (1974)
- Chevrolet K10 Suburban (1970–1972)
- Chevrolet K10 Suburban 6.5L (1968–1969)
- Chevrolet K10 Suburban 6.6L (1970–1972)
- Chevrolet K20 7.4L (1976–1978)
- Chevrolet K20 Pickup 6.5L (1968–1969)
- Chevrolet K20 Pickup 7.4L (1973–1974)
- Chevrolet K20 Suburban 7.4L (1973–1985)
- Chevrolet K30 7.4L (1977–1986)
- Chevrolet K30 Pickup (1970–1971)
- Chevrolet K30 Pickup 6.5L (1968–1969)
- Chevrolet K30 Pickup 6.6L (1970–1971)
- Chevrolet K30 Pickup 7.4L (1973–1974)
- Chevrolet K5 Blazer 7.4L (1976–1978)
- Chevrolet Kingswood (1971–1972)
- Chevrolet Kingswood 6.6L (1971–1972)
- Chevrolet Kingswood 7.4L (1970–1972)
- Chevrolet Monte Carlo (1970–1972)
- Chevrolet Monte Carlo 6.6L (1970–1972)
- Chevrolet Monte Carlo 7.4L (1970–1975)
- Chevrolet Nova (1970)
- Chevrolet Nova 6.5L (1969–1970)
- Chevrolet Nova 6.6L (1970)
- Chevrolet R30 7.4L (1987–1988)
- Chevrolet R3500 7.4L (1989)
- Chevrolet Townsman (1972)
- Chevrolet Townsman 6.6L (1972)
- Chevrolet Townsman 7.4L (1970–1972)
- Chevrolet V30 7.4L (1987–1988)
- Chevrolet V3500 7.4L (1989)
- GMC C15 7.4L (1975–1978)
- GMC C15 Suburban 7.4L (1975–1978)
- GMC C15/C1500 Pickup (1970–1972)
- GMC C15/C1500 Pickup 6.5L (1968–1969)
- GMC C15/C1500 Pickup 6.6L (1970–1972)
- GMC C15/C1500 Pickup 7.4L (1973–1974)
- GMC C15/C1500 Suburban (1970–1972)
- GMC C15/C1500 Suburban 6.5L (1968–1969)
- GMC C15/C1500 Suburban 6.6L (1970–1972)
- GMC C15/C1500 Suburban 7.4L (1973–1974)
- GMC C1500 7.4L (1979–1980)
- GMC C1500 Suburban 7.4L (1979–1980)
- GMC C25 7.4L (1975–1978)
- GMC C25 Suburban 7.4L (1975–1978)
- GMC C25/C2500 Pickup (1970–1972)
- GMC C25/C2500 Pickup 6.5L (1968–1969)
- GMC C25/C2500 Pickup 6.6L (1970–1972)
- GMC C25/C2500 Pickup 7.4L (1973–1974)
- GMC C25/C2500 Suburban (1970–1972)
- GMC C25/C2500 Suburban 6.5L (1968–1969)
- GMC C25/C2500 Suburban 6.6L (1970–1972)
- GMC C25/C2500 Suburban 7.4L (1974)
- GMC C2500 7.4L (1979–1986)
- GMC C2500 Suburban 7.4L (1979–1986)
- GMC C35 7.4L (1975–1978)
- GMC C35/C3500 Pickup (1970–1972)
- GMC C35/C3500 Pickup 6.5L (1968–1969)
- GMC C35/C3500 Pickup 6.6L (1970–1972)
- GMC C35/C3500 Pickup 7.4L (1973–1974)
- GMC C3500 7.4L (1979–1986)
- GMC G25 7.4L (1975–1976)
- GMC G35 7.4L (1976)
- GMC Jimmy 7.4L (1973–1976)
- GMC K15 7.4L (1976)
- GMC K15/K1500 Pickup 6.5L (1968–1969)
- GMC K15/K1500 Suburban (1970–1972)
- GMC K15/K1500 Suburban 6.5L (1968)
- GMC K15/K1500 Suburban 6.6L (1970–1972)
- GMC K15/K1500 Suburban 7.4L (1974)
- GMC K1500 7.4L (1980)
- GMC K25 7.4L (1976–1978)
- GMC K25 Suburban 7.4L (1976–1977)
- GMC K25/K2500 Pickup 6.5L (1968–1969)
- GMC K25/K2500 Pickup 7.4L (1973–1974)
- GMC K25/K2500 Suburban 6.5L (1968)
- GMC K25/K2500 Suburban 7.4L (1974)
- GMC K35/K3500 Pickup (1970–1971)
- GMC K35/K3500 Pickup 6.5L (1968–1969)
- GMC K35/K3500 Pickup 6.6L (1970–1971)
- GMC K35/K3500 Pickup 7.4L (1973–1974)
- GMC K3500 7.4L (1979–1986)
- GMC R3500 7.4L (1987–1989)
- GMC Sprint (1971–1975)
- GMC Sprint 6.6L (1971)
- GMC Sprint 7.4L (1971–1975)
- GMC V3500 7.4L (1987–1989)
| Part No. | 7891 |
|---|---|
| Brand | Edelbrock |
| Part Type | Engine Timing Camshaft Gear |
| Weight | 4.45 lb |
| UPC | 00085347078912 |
| Country of Origin | USA |
Platform-level fitment (Ford + GM, Phase 1). We publish the engine platform a part is built for — not year-and-trim application data — so nothing here confirms a fit on a specific vehicle. Confirm fitment with us before ordering: (714) 202-7886.