
COMP ACC & OIL SYSTEM FOR HOLLEY GDZ-NAT
Fits Ford 7.3L Godzilla - Includes Holley Timing Cover/Coolant Manifold, SD7 A/C Compressor, Alternator, P/S Pump, Tensioner, Water Pump, Belt & Pulleys, Oil Pump, and Oil Pan
Overview
Holley is proud to present our revolutionary high-mount accessory drive and oiling system for the Ford 7.3-liter Godzilla Engine. With our patent-pending technology, we have integrated the timing cover, oil pump, oil pan, water pump, alternator, and the option for A/C and/or P/S, all in one streamlined system. Furthermore, this versatile accessory drive is compatible with both factory crank pulleys and aftermarket damper/pulleys. Positioning an engine swap correctly is crucial, ensuring it aligns with the vehicle's original engine's crankshaft centerline. Our innovative solution achieves just that, allowing proper engine placement while providing clearance for a stock Fox Body hood (when used with a low-profile intake). Our system replaces Ford's sump-mounted oil pump with a high-capacity gerotor pump positioned behind the timing cover, gaining crucial crossmember and ground clearance. To ensure reliability, we have incorporated a proven pump design utilizing Melling sourced components that mimics the factory pressure level. Should your application require additional oil pressure, we offer a high-pressure spring kit (part# 302-102) for easy installation. Unlike most pumps that require removing the oil pan to change the pressure spring, we have introduced a first-of-its-kind external access port, allowing hassle-free spring switching. Moreover, our cast aluminum oil pan features a performance-minded windage tray and baffle, guaranteeing proper oil pickup during high G maneuvers. For extreme situations, such as drag racing, upgrade to the optional race baffle (part #302-105) to always ensure proper oil delivery. For those interested in adding an oil cooler, see Earl's part #GZ0001ERL which offers dual -8AN male fittings for this purpose. Our accessory drive system offers flexible configuration options to meet various needs. For instance, we provide different alternator choices to cater to diverse performance and electrical requirements. If you prefer a customized modular setup, you can opt to exclude the A/C and/or P/S components. Our "base kits" include everything except these optional components. Alternatively, you can choose our "Holley Complete Kit" for the most commonly selected, cost-effective combination. Holley's Godzilla High-Mount Accessory Drive is the ultimate solution for engine swaps, offering unparalleled functionality, adaptability, and ease of installation.
Features:
- Complete kits include everything needed for the most common, cost-effective combination – including all adapters, accessories, and belt
- Crank concentric driven Gerotor oil pump utilizes all Melling internal components
- OE style cast oil pan design with 6.5 quarts oil capacity (with filter) and 1/2-inch NPT turbo drain-back port
- Integrated oil priming ports and procedure and oil cooler plumbing ports (must purchase Earl's #GZ0001ERL to utilize oil cooler ports)
- "Always accessible" pressure spring port allows for quick oil spring pressure changes
- Advanced windage tray and baffle system keep oil in the sump
- New oil pan hardware and dipstick included
- Fits Ford 7.3-liter Godzilla engine – ideal for engine swaps
- Includes new front main seal and installation tool
- Works with the original factory crank pulley, as well as aftermarket damper/pulleys
- This high-mount accessory drive has all accessories pulled up and in tighter than other options
- Relocates heater hose connections out of sight for a noticeable visual improvement over the OE design
- Alternator options do not require the original ECU control to function
- P/S pump with the optional external reservoir is ideal for hydro-boost applications
- Choose from natural as-cast aluminum or black finish
About Holley

Specs
A/C Compressor Included | Yes |
---|---|
A/C Compressor Type | SD7 |
Accessory Drive Style | High-Mount |
Alternator Amperage | 105 |
Alternator Included | Yes |
Application | Ford 7.3L Godzilla |
Belt Color | Black |
Belt Groove Quantity | 8 |
Belt Included | Yes |
Belt Type | Serpentine |
Brand | Holley |
Category | Belts and Cooling |
Damper Included | No |
Damper Style | Factory |
Emission Code | 5 |
Engine | Ford 7.3L Godzilla |
Finish | Cast |
Grade Type | Performance |
Hardware Included | Yes |
Housing Material | Aluminum |
Material | Cast Aluminum |
Oil Adapters Included | No |
Oil Cooler Included | No |
Oil Cooler Ports | Yes |
Oil Priming Port | Yes |
Oil Pump and Pan Included | Yes |
Oil Pump Gear Material | Powdered Metal |
Oil Pump Type | Gerotor |
Oil System Capacity (w/ filter) | 6.5 Quarts |
Output | 105 Amps |
Part Type | Accessory Drive Belt Kit |
Power Steering Hardline Included | Yes |
Power Steering Pulley Included | Yes |
Power Steering Pump Included | Yes |
Power Steering Reservoir Included | Yes |
Product Type | Accessory Drive Kits |
Pulley Color | Black |
Pulley Material | Composite and Steel |
Pulley Style | Serpentine |
Sub Category | Accessory Drive Belt System Components |
Tensioner Included | Yes |
Thermostat Included | No |
Turbo Oil Drainback | Yes |
Universal Or Specific Fit | Specific |
Warranty | Limited 90 Day |
Water Neck Included | Yes |
Water Pump Included | Yes |
Water Pump Pulley Included | Yes |
UPC | 090127818978 |
Part Number | 20-340 |
Service Parts
- Idler Pulley, Smooth, 2.75" Diameter$51.17Qty:
- Fits Holley Oil Pan for Ford 7.3L Godzilla Engine$33.26Qty:
- Optional Accessory for 7.3L Godzilla Engine with Holley High-Mount Accessory Drive System - Works with Factory or Holley Intake Manifolds$93.56Qty:
- Fits Alternator Relocation Kit 97-347, 97-368 and 97-369.$25.56Qty:
- Smaller lighter alternator for use with Holley accessory brackets. This alternator is recommended for use with the LS Low-Mount accessory brackets but can also be used where clearance matters on all other Holley LS brackets.$251.06Qty:
- Fits 2003-Up Mopar Gen III Hemi Engines - 45 Degree$73.52Qty:
- Optional Accessory for 7.3L Godzilla Engine with Holley High-Mount Accessory Drive System$58.64Qty:
- Fits Holley Oil Pan for Ford 7.3L Godzilla Engine if Not Using GZ0001ERL Adapter$17.96Qty:
- Fits 2020 & Up Ford 7.3L Gasoline V8 Godzilla Engines - for Use with Holley and Stock Factory Timing Covers.$22.72Qty:
- Optional Accessory for 7.3L Godzilla Engine with Holley High-Mount Accessory Drive System$79.48Qty:
- Replacement Part for 7.3L Godzilla Engine with Holley High-Mount Accessory Drive System$89.42Qty:
- Replacement Power Steering Pump - Saginaw Type II, for Use w/ 2014 & Up Gen III Hemi Engines (5.7L and 6.4L) & Holley Godzilla High-Mount Accessory Drive System$380.95Qty:
- Fits Ford 7.3L Godzilla Engine Using Holley Pan and Pump Only$116.96Qty:
- Fits Holley Accessory Drive Kits with Holley Oiling System - Pickup Tube Assembly$35.96Qty:
- Fits Ford 7.3L Godzilla High-Mount Accessory Drive System - Holley Pan Only$224.96Qty:
- Fits Ford 7.3L Godzilla Engine Using Holley Pan and Pump Only$17.21Qty:
- Fits Ford 7.3L Godzilla Engine with Holley High-Mount Accessory Drive System - Holley Oil Pan Only$44.96Qty:
- Fits Holley Oil Pans for Ford 7.3L Godzilla Engine - Turbo Drain Port Plug Not Included$34.95Qty:
- Fits Holley Oil Pans for Ford 7.3L Godzilla Engine - Turbo Drain Port Plug Included$35.96Qty:
- Fits Ford 7.3L Godzilla Engine - Included with Holley Oil Pan/Accessory Kits$35.96Qty:
Emissions
5
This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.
Tech Resources
Most questions can be answered by referring to the comprehensive .pdf instructions available above.
Warranty Information
Limited 90 Day: See Details

GODZILLA ACCESSORY DRIVE COMPARISON
Part Number | Type | Oil Pump and Oil Pan | Timing Cover (Included) |
---|---|---|---|
20-300 / 20-300BK | Base Kit (Acc. Not Included) | OE Oil Pump/Pan (Not Included) | Holley Cover for OE Pan (97-410 or 97-418) |
20-310 / 20-310BK | Complete Kit | OE Oil Pump/Pan (Not Included) | Holley Cover for OE Pan (97-410 or 97-418) |
20-320 / 20-320BK | Base Kit (Acc. Not Included) | Includes Holley Pump and Pan | Holley Cover for Holley Pump/Pan (97-401 or 97-417) |
20-340 / 20-340BK | Complete Kit | Includes Holley Pump and Pan | Holley Cover for Holley Pump/Pan (97-401 or 97-417) |
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