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1969-1985 Small Block Chevy Aluminum Double Lower Pulley, Long Pump

SAME DAY SHIPPING! Order within the next 10 hours and receive same day shipping

Specs
Material Type:
Aluminum
Sold in Quantity:
Each
Belt Type:
V-Belt
Finish:
Natural
Groove Count:
2
Bolt Hole Pattern:
3 on 2.75
Overall Diameter:
6.60
Inside Diameter:
1.10
Mounted Length:
2.69
Belt Width:
.41
Notes
Mounted length is from the face of the harmonic balancer towards the front of the vehicle.
1969-1985 Small Block Chevy Aluminum Double Lower Pulley, Long Pump
1969-1985 Small Block Chevy Aluminum Double Lower Pulley, Long Pump
1969-1985 Small Block Chevy Aluminum Double Lower Pulley, Long Pump

Click image to enlarge

Details

Reviews

Q & A

What's in the Box

Cast aluminum double groove V-belt crankshaft pulley for use with 69-85 Small Block Chevy long style water pumps.

  • Precision machined aluminum construction
  • Lightweight and strong
  • Two grooves for V-belts

Get the correct pulleys for your application by learning which water pump you have as explained in our tech article. SBC - Short vs Long Water Pump

Item Details

Double Groove, 6-5/8" Diameter

Notes

  1. It may be necessary to shim either or both of the pulleys to achieve perfect belt alignment. There are variances between manufacturers of both water pumps and pulleys.
  2. Water Pump ID Chart (GIF)

Customer Reviews

This product has no reviews.

Product Q&A

1 questions : 1 answers

1 answers

Will this pulley fit the harmonic balancer fron a 94 gmc 350? I am using a 350 from a 94 GMC in a 51 GMC and going from serpentine to v-belt. I would like to use the existing harmonic balancer if possible.

Mark60
February 27, 2013

Will this pulley fit the harmonic balancer fron a 94 gmc 350? I am using a 350 from a 94 GMC in a 51 GMC and going from serpentine to v-belt. I would like to use the existing harmonic balancer if possible.

Answers

February 27, 2013
Jason
In most cases pulley number 91015478 will work on the later years such as your 94 with a 350 and serpentine belt system to switch to V belts. Occasionally the shoulder on the center hole does not match the balancer in which case it could be ground down for a flush fit against the balancer. This pulley is for the long water pump and also available for the short pump if needed. Shimming of the water pump or lower pulley for proper belt alignment may be required.
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1969-1985 Small Block Chevy Aluminum Single Upper Pulley, Long Pump
(Part #91015475)
                        

Cast aluminum single groove V-belt upper pulley for 69-85 Small Block Chevy long style water pumps. Fits over 5/8" water pump snout, but can be drilled out to 3/4" if needed.

  • Precision machined aluminum construction
  • Lightweight and strong
  • Single groove for V-belt
  • From inside of pulley at fan hub to rear edge of pulley is 2"
  • From rear edge of pulley to center of V-belt groove is 5/16"
  • Center hole fits a 5/8" shaft (can be drilled out to 3/4" if needed)
  • Diameter is 6-5/8"

Note:  When using in conjunction with an electric fan assembly, be sure to consider the pulley installation screw kit # 910-15440 shown below.

Get the correct pulleys for your application by learning which water pump you have as explained in our tech article. SBC - Short vs Long Water Pump

Item Details

Single Groove, 6-5/8" Diameter
Small Block Chevy Alum. Long Pump Double Groove Upper Pulley
(Part #91015476)
                        Cast aluminum double groove V-belt upper pulley for 69-85 Small  Block Chevy long style water pumps. Fits over 5/8" water pump snout, but can be  drilled out to 3/4" if needed. 
  • Precision machined aluminum construction
  • Lightweight and strong
  • Two grooves for V-belts
  • Hub surface to first groove center: 2.415"
  • Center-to-center of grooves:  11/16"
  • Center hole fits a 5/8" shaft (can be drilled out to 3/4" if needed)
  • Diameter:  6-5/8"

It may be necessary to shim either or both of the pulleys to achieve perfect belt alignment. There are variances between manufacturers of both water pumps and pulleys.

Get the correct pulleys for your application by learning which water pump you have as explained in our tech article. SBC - Short vs Long Water Pump.

Item Details

Double Groove, 6-5/8" Diameter
Aluminum Lower Pulley Spacer
(Part #91015721)
                        Spaces lower pulley out to match with the upper pulleys. Each spacer is .090" thick aluminum.
                    
Aluminum Lower Pulley Screw Kit, Fine Thread
(Part #91015441)
                        

Set of three Allen bolts for lower aluminum water pump pulley.

  • Fine Thread
Universal Water Pump Shim Kit
(Part #54564035)
                        

Water pump pulley shim kit provides proper drive belt alignment with pulleys.  Kit contains two aluminum 1/16" spacer and one 1/8" spacer.

Learn more about using different water pump accessories to best fit your application by reading our tech article.  SBC - Short vs Long Water Pump

Item Details

(2) 1/16" shims, (1) 1/8" shim