1979 GMC P1500 Melling Parts

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1979 GMC P1500 Engine Oil Pump Melling

High Performance Oil Pump
25% Higher Volume High Performance Oil Pump 15 PSI Higher Pressure Relief Spring Installed Billet Steel Pump Gears Drive & Idler Shafts extended Into Cover Includes 12770 Chrome Moly Steel Intermediate Shaft With Steel Guide Includes Optional Standard Pressure Spring Uses 3/4 Inch Diameter Press-Fit Pickup Tube Assembly (Not Included)
10778 High Performance, High Volume, High Pressure, Billet Steel Oil Pump
Performance
Product Attributes:
- Oil Pump Pressure Type: High Pressure
- Additional Volume Over Stock Percentage: 25%
- Adjustable Bypass Pressure: Yes
- Alternate Pressure Springs Included: Yes
- Grade Type: Performance
- Mounting Hole Diameter:
  - 0.240
  - 6.00
- Anti-Cavitation: No
- Manufactured For: Gm Bbc
- Screen Information: 3/4" Press In
- Mounting Hole Quantity: 2
- Upgrade for Pump Number: 10770
- Additional Cover Shaft Support: Yes
- Gear Material: Billet Steel
- Oil Pump Volume Type: High Volume
- Manufactured Pressure: (pink) 70 Psi
- Optional Spring Pressure 1: (plain) 52 Psi
- Gasket Or Seal Included: No
- Gear Type: Spur Gear
- Optional Spring Pressure 2: N/a
- Drive Shaft Included: Yes
- Drive Type: Drive Shaft
- Pickup Tube Diameter:
  - 0.750
  - 19.00
- Oil Pump Type: Gear
Features:
- Includes +15 PSI higher pressure relief spring installed and optional standard pressure relief spring.
- Extended drive and idler shaft for additional support in the cover eliminating dynamic shfaft deflection at increased RPM levels.
- Billet steel gears.
- Cover is doweled to the pump housing to assure alignment of the shaft bores.
- 25% volume increase over standard oil pump.
- Includes 12770 chrome moly intermediate shaft with steel guide.
- Cast Iron Housing
- High volume performance upgrade for the 10770.
Made in USA. Melling high performance oil pumps provide dependable performance every time in every application under the toughest RPM conditions. High volume performance upgrade for the 10770. Increase in volume of 25% over stock oil pump. The drive shaft has been manufactured from chrome-moly steel. The drive and idler shafts have been extended to allow for additional support in the cover. Additional support eliminates dynamic shaft deflection at increased RPM levels. The cover is doweled to the pump housing to assure alignment of the shaft bores. The relief valve has a screw-in plug instead of a pin. The housing and cover are CNC machined and phosphate coated. An additional spring, the original stock replacement is supplied which will reduce bypass pressure if needed. Includes 12770 chrome moly intermediate shaft with steel guide. Built with billet steel gears. Every Melling high performance oil pump is individually tested for pressure and flow under actual engine operating conditions.