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Since 1952
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Speedway Motors Bill Smith
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Economy Small Block Chevy Rotating Assembly

Price: $49.99 - $479.99
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Speedway introduces rotating assemblies, with an optional balance job. Includes 2-pc rear main seal cast steel crank, rods and pistons. Cranks are new so they use standard size bearings.

All balancing is done with our state-of-the-art "hines" balancer by race mechanics with over 30 years of experience! A kit purchased with the optional balance job will ship in 24-48 hours.
 

NOTE: Piston rings are not included and must be purchased separately.

Kits include:

  • Speedway Cast Steel Crankshaft
    • Two-piece rear main
    • 80-60-06 cast steel construction
    • Fatigue-resistant with near forged steel endurance
    • Standard size journals
  • Speedway 5140 I-Beam Claimer Connecting Rods
    • 5140 heat treated steel
    • Shot peened and magnafluxed
    • Press pin
    • 5.7" or 6.0" lengths available
  • KB Signature Series Hypereutectic Claimer Pistons
    • Coated skirts
    • Wrist pin lock rings
    • T-5 hypereutectic construction
    • Can be used with press fit or floating wrist pins
  • Speedway 5140 I-Beam Connecting Rods
    • 5.7" length
      • Press pin
      • 646 grams
    • 6.0" length
      • Press pin
      • 585 grams
    Reviews for Item #: 91510206
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    350 Flat Top-Four Valve Relief 5.7" Rod
    Price:
    $449.99
    KT
    Item #:
    91510206
    Item Details:
    Flat top, 4 valve relief
    Ring style: A
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Speedway Chevy 350 Cast Steel Crankshaft
    Item #:
    91515350
    1
      Show Specifications
    • 91515350
      Rear Main Seal Style
      2-piece
      Stroke
      3.480"
      Main Journal Style
      350 mains
      Rod Journal Diameter
      2.10"
      Weight
      50
      Material Type
      Cast Steel
      Sold in Quantity
      Each
    S/B Chevy 5140 Steel I-Beam Rods, 5.7"
    Item #:
    91015327
    Item Details:
    Press Pin - 646 grams
    1
      Show Specifications
    • 91015327
      Center to Center
      5.700"
      Crank Pin Diameter
      2.220"
      Wrist Pin Diameter
      0.920"
      Rod Crank End Width
      0.940"
      Weight
      646
      Material Type
      Steel
      Sold in Quantity
      Set
      Notes
      Torque rod bolts to 50 ft./lbs.
    Claimer Chevy 350 Pistons - Flat 4V Relief
    Item #:
    4749901
    Item Details:
    C/R 58cc=10.9, 64cc=10.2, 76cc=9.0
    Piston/Pin Weight: 630 g
    Rod Length: 5.7"
     
    (0 Rating)
    350 Flat Top-Two Valve Relief 5.7" Rod
    Price:
    $449.99
    KT
    Item #:
    91510207
    Item Details:
    Flat top, 2 valve relief
    Ring style: A
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Speedway Chevy 350 Cast Steel Crankshaft
    Item #:
    91515350
    1
      Show Specifications
    • 91515350
      Rear Main Seal Style
      2-piece
      Stroke
      3.480"
      Main Journal Style
      350 mains
      Rod Journal Diameter
      2.10"
      Weight
      50
      Material Type
      Cast Steel
      Sold in Quantity
      Each
    S/B Chevy 5140 Steel I-Beam Rods, 5.7"
    Item #:
    91015327
    Item Details:
    Press Pin - 646 grams
    1
      Show Specifications
    • 91015327
      Center to Center
      5.700"
      Crank Pin Diameter
      2.220"
      Wrist Pin Diameter
      0.920"
      Rod Crank End Width
      0.940"
      Weight
      646
      Material Type
      Steel
      Sold in Quantity
      Set
      Notes
      Torque rod bolts to 50 ft./lbs.
    Claimer Chevy 350 Pistons - Flat Top
    Item #:
    4749902
    Item Details:
    C/R 58cc=10.7, 64cc=10.4, 76cc=9.1
    Piston/Pin Weight:614 g
    Rod Length: 5.7"
     
    (0 Rating)
    350 Flat Top-Two Valve Relief 6" Rod
    Price:
    $469.99
    EA
    Item #:
    91510212
    Item Details:
    Flat top, 2 valve relief
    Ring style: A
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Speedway Chevy 350 Cast Steel Crankshaft
    Item #:
    91515350
    1
      Show Specifications
    • 91515350
      Rear Main Seal Style
      2-piece
      Stroke
      3.480"
      Main Journal Style
      350 mains
      Rod Journal Diameter
      2.10"
      Weight
      50
      Material Type
      Cast Steel
      Sold in Quantity
      Each
    S/B Chevy 5140 Steel I-Beam Rods, 6.0"
    Item #:
    91015324
    Item Details:
    Press Pin - 585 grams
    1
    Claimer Chevy 350 Pistons - Flat Top
    Item #:
    4749908
    Item Details:
    C/R 58cc=11.2, 64cc=10.4, 76cc=9.1
    Piston/Pin Weight: 541 g
    Rod Length: 6.0"
     
    (0 Rating)
    350 .150" Solid Dome - 5.7" Rod
    Price:
    $449.99
    KT
    Item #:
    91510208
    Item Details:
    0.150" solid dome
    Ring style: A
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Speedway Chevy 350 Cast Steel Crankshaft
    Item #:
    91515350
    1
      Show Specifications
    • 91515350
      Rear Main Seal Style
      2-piece
      Stroke
      3.480"
      Main Journal Style
      350 mains
      Rod Journal Diameter
      2.10"
      Weight
      50
      Material Type
      Cast Steel
      Sold in Quantity
      Each
    S/B Chevy 5140 Steel I-Beam Rods, 5.7"
    Item #:
    91015327
    Item Details:
    Press Pin - 646 grams
    1
      Show Specifications
    • 91015327
      Center to Center
      5.700"
      Crank Pin Diameter
      2.220"
      Wrist Pin Diameter
      0.920"
      Rod Crank End Width
      0.940"
      Weight
      646
      Material Type
      Steel
      Sold in Quantity
      Set
      Notes
      Torque rod bolts to 50 ft./lbs.
    Claimer Chevy 350 Pistons - .150 Dome
    Item #:
    4749904
    Item Details:
    C/R 58cc=12.7, 64cc=11.6, 76cc=10.1
    Piston/Pin Weight: 762 g
    Rod Length: 5.7"
     
    (0 Rating)
    350 .275" Solid Dome-5.7" Rod
    Price:
    $449.99
    KT
    Item #:
    91510209
    Item Details:
    0.275" solid dome
    Ring style: A
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Speedway Chevy 350 Cast Steel Crankshaft
    Item #:
    91515350
    1
      Show Specifications
    • 91515350
      Rear Main Seal Style
      2-piece
      Stroke
      3.480"
      Main Journal Style
      350 mains
      Rod Journal Diameter
      2.10"
      Weight
      50
      Material Type
      Cast Steel
      Sold in Quantity
      Each
    S/B Chevy 5140 Steel I-Beam Rods, 5.7"
    Item #:
    91015327
    Item Details:
    Press Pin - 646 grams
    1
      Show Specifications
    • 91015327
      Center to Center
      5.700"
      Crank Pin Diameter
      2.220"
      Wrist Pin Diameter
      0.920"
      Rod Crank End Width
      0.940"
      Weight
      646
      Material Type
      Steel
      Sold in Quantity
      Set
      Notes
      Torque rod bolts to 50 ft./lbs.
    Claimer Chevy 350 Pistons - .275 Dome
    Item #:
    4749905
    Item Details:
    C/R 58cc=13.9, 64cc=12.7, 76cc=10.8
    Piston/Pin Weight: 772 g
    Rod Length: 5.7"
     
    (0 Rating)
    350 .465" Hollow Dome-5.7" Rod
    Price:
    $449.99
    KT
    Item #:
    91510211
    Item Details:
    0.465 hollow dome
    Ring style: A
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Speedway Chevy 350 Cast Steel Crankshaft
    Item #:
    91515350
    1
      Show Specifications
    • 91515350
      Rear Main Seal Style
      2-piece
      Stroke
      3.480"
      Main Journal Style
      350 mains
      Rod Journal Diameter
      2.10"
      Weight
      50
      Material Type
      Cast Steel
      Sold in Quantity
      Each
    S/B Chevy 5140 Steel I-Beam Rods, 5.7"
    Item #:
    91015327
    Item Details:
    Press Pin - 646 grams
    1
      Show Specifications
    • 91015327
      Center to Center
      5.700"
      Crank Pin Diameter
      2.220"
      Wrist Pin Diameter
      0.920"
      Rod Crank End Width
      0.940"
      Weight
      646
      Material Type
      Steel
      Sold in Quantity
      Set
      Notes
      Torque rod bolts to 50 ft./lbs.
    Claimer Chevy 350 Pistons - .465 Dome
    Item #:
    4749903
    Item Details:
    C/R 58cc=14.9, 64cc=13.5, C/R 76cc=11.3
    Piston/Pin Weight: 778 g
    Rod Length: 5.7"
     
    (0 Rating)
    377 Flat Top-Two Valve Relief-5.7" Rod
    Price:
    $479.99
    KT
    Item #:
    91510213
    Item Details:
    Flat top, 2 valve relief
    Ring style: A
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Speedway Chevy 350 Cast Steel Crankshaft
    Item #:
    91515350
    1
      Show Specifications
    • 91515350
      Rear Main Seal Style
      2-piece
      Stroke
      3.480"
      Main Journal Style
      350 mains
      Rod Journal Diameter
      2.10"
      Weight
      50
      Material Type
      Cast Steel
      Sold in Quantity
      Each
    S/B Chevy 5140 Steel I-Beam Rods, 5.7"
    Item #:
    91015327
    Item Details:
    Press Pin - 646 grams
    1
      Show Specifications
    • 91015327
      Center to Center
      5.700"
      Crank Pin Diameter
      2.220"
      Wrist Pin Diameter
      0.920"
      Rod Crank End Width
      0.940"
      Weight
      646
      Material Type
      Steel
      Sold in Quantity
      Set
      Notes
      Torque rod bolts to 50 ft./lbs.
    Claimer Chevy 377/400 Pistons - Flat Top
    Item #:
    4749907
    Item Details:
    (377) C/R 64cc=10.9, 76cc=9.6
    (400) C/R 58cc=12.6, 64cc=11.7, 76cc=10.3
    Piston/Pin Weight: 630 g
    Rod Length: 5.7(377), 5.565(400)
    Main Bearing Spacers For S/B Chevy 350 Crank
    Item #:
    5051120
    1
     
    (0 Rating)
    383 Flat Top-.110" Dish-5.7" Rod
    Price:
    $449.99
    KT
    Item #:
    91510221
    Item Details:
    0.110" dish
    Ring style: A
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Speedway Chevy 383 Cast Steel Crankshaft
    Item #:
    91515383
    1
    S/B Chevy 5140 Steel I-Beam Rods, 5.7"
    Item #:
    91015327
    Item Details:
    Press Pin - 646 grams
    1
      Show Specifications
    • 91015327
      Center to Center
      5.700"
      Crank Pin Diameter
      2.220"
      Wrist Pin Diameter
      0.920"
      Rod Crank End Width
      0.940"
      Weight
      646
      Material Type
      Steel
      Sold in Quantity
      Set
      Notes
      Torque rod bolts to 50 ft./lbs.
    Claimer Chevy 383 Pistons - .110 Dish
    Item #:
    4749912
    Item Details:
    C/R 58cc=10.9, 64cc=10.2, 76cc=9.1
    Piston/Pin Weight: 594 g
    Rod Length: 5.7"
     
    (0 Rating)
    383 Flat Top-Two Valve Relief-5.7"
    Price:
    $459.99
    EA
    Item #:
    91510214
    Item Details:
    Flat top, 2 valve relief
    Ring style: A
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Speedway Chevy 383 Cast Steel Crankshaft
    Item #:
    91515383
    1
    S/B Chevy 5140 Steel I-Beam Rods, 5.7"
    Item #:
    91015327
    Item Details:
    Press Pin - 646 grams
    1
      Show Specifications
    • 91015327
      Center to Center
      5.700"
      Crank Pin Diameter
      2.220"
      Wrist Pin Diameter
      0.920"
      Rod Crank End Width
      0.940"
      Weight
      646
      Material Type
      Steel
      Sold in Quantity
      Set
      Notes
      Torque rod bolts to 50 ft./lbs.
    Claimer Chevy 383 Pistons - Flat Top
    Item #:
    4749906
    Item Details:
    C/R 58cc=12.0, 64cc=11.1, 76cc=9.8
    Piston/Pin Weight: 607 g
    Rod Length: 5.7"
     
    (0 Rating)
    383 Flat Top-Two Valve Relief-6" Rod
    Price:
    $469.99
    EA
    Item #:
    91510217
    Item Details:
    Flat top, 2 valve relief
    Ring style: C
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Speedway Chevy 383 Cast Steel Crankshaft
    Item #:
    91515383
    1
    S/B Chevy 5140 Steel I-Beam Rods, 6.0"
    Item #:
    91015324
    Item Details:
    Press Pin - 585 grams
    1
    Claimer Chevy 383 Pistons - Flat Top
    Item #:
    4749909
    Item Details:
    C/R 58cc=11.2, 64cc=10.1, 76cc=9.8
    Piston/Pin Weight: 527 g
    Rod Length: 6", Ring Style: C
     
    (0 Rating)
    383 .150" Solid Dome - 5.7" Rod
    Price:
    $459.99
    KT
    Item #:
    91510216
    Item Details:
    0.150" solid dome
    Ring style: A
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Speedway Chevy 383 Cast Steel Crankshaft
    Item #:
    91515383
    1
    S/B Chevy 5140 Steel I-Beam Rods, 5.7"
    Item #:
    91015327
    Item Details:
    Press Pin - 646 grams
    1
      Show Specifications
    • 91015327
      Center to Center
      5.700"
      Crank Pin Diameter
      2.220"
      Wrist Pin Diameter
      0.920"
      Rod Crank End Width
      0.940"
      Weight
      646
      Material Type
      Steel
      Sold in Quantity
      Set
      Notes
      Torque rod bolts to 50 ft./lbs.
    Claimer Chevy 383 Pistons - .150 Dome
    Item #:
    4749910
    Item Details:
    C/R 55cc=13.6, 64cc=12.5, 76cc=10.8
    Piston/Pin Weight: 612 g
    Rod Length: 5.7"
     
    (0 Rating)
    400 Flat Top-Two Valve Relief - 5.7" Rod
    Price:
    $459.99
    KT
    Item #:
    91510219
    Item Details:
    Flat top, 2 valve relief
    Ring style: A
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Speedway Chevy 400 Cast Steel Crankshaft
    Item #:
    91515400
    Item Details:
    NOTE: Cut for a 5.7 rod and will NOT fit stock 5.565 rod.
    1
    S/B Chevy 5140 Steel I-Beam Rods, 5.7"
    Item #:
    91015327
    Item Details:
    Press Pin - 646 grams
    1
      Show Specifications
    • 91015327
      Center to Center
      5.700"
      Crank Pin Diameter
      2.220"
      Wrist Pin Diameter
      0.920"
      Rod Crank End Width
      0.940"
      Weight
      646
      Material Type
      Steel
      Sold in Quantity
      Set
      Notes
      Torque rod bolts to 50 ft./lbs.
    Claimer Chevy 400 Pistons - Flat Top
    Item #:
    4749911
    Item Details:
    C/R 58cc=12.6, 64cc=11.7, 76cc=10.3
    Piston/Pin Weight: 624 g
    Rod Length: 5.7"
     
    (0 Rating)
    Labor To Side Clearance Rods and Balance Rotating Assembly - 380/377 Kits
    Price:
    $149.99
    KT
    In Stock
    Item #:
    91510200
    Item Details:
    350/377 kit
    Please allow 24-48 hrs for a kit to ship w/ this labor option.
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Labor-Balance Rotating Assy
    Item #:
    91600016
    1
    Side Clearance 8 Rods
    Item #:
    91600017
    1
     
    (1 Rating)
    Labor To Side Clearance Rods and Balance Rotating Assembly - 383/400 Kits (W/ Balance Plt & 8" Damp)
    Price:
    $219.99
    KT
    In Stock
    Item #:
    91510201
    Item Details:
    383/400 kit (includes balance plate and 8" damper)
    Please allow 24-48 hrs for a kit to ship w/ this labor option.
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Labor-Balance Rotating Assy
    Item #:
    91600016
    1
    Side Clearance 8 Rods
    Item #:
    91600017
    1
    SBC 400 Harmonic Balancer - 8" Diameter - Steel
    Item #:
    91015400
    1
      Show Specifications
    1955-85 S/B Chevy Balancing Plate for 2 Piece Rear Main Seal Design
    Item #:
    91615375
    1
      Show Specifications
    • 91615375
      Overall Thickness
      0.110"
      Material Type
      Steel
      Finish
      Natural
      Sold in Quantity
      Each
      Notes
      Fits 1955-1985 SBC with a 2 piece rear main seal.
     
    (0 Rating)
    Labor - Install Pistons on Rods
    Price:
    $49.99
    ST
    In Stock
    Item #:
    91600015
    Item Details:
    Press fit pistons on rods
     
    (0 Rating)
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    Item #:
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    Labor To Side Clearance Rods and Balance Rotating Assembly - 380/377 Kits
    Price:
    $149.99
    KT
    In Stock
    Item #:
    91510200
    Item Details:
    350/377 kit
    Please allow 24-48 hrs for a kit to ship w/ this labor option.
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Labor-Balance Rotating Assy
    Item #:
    91600016
    1
    Side Clearance 8 Rods
    Item #:
    91600017
    1
     
    (1 Rating)
    Labor - Install Pistons on Rods
    Price:
    $49.99
    ST
    In Stock
    Item #:
    91600015
    Item Details:
    Press fit pistons on rods
     
    (0 Rating)
    Labor To Side Clearance Rods and Balance Rotating Assembly - 383/400 Kits (W/ Balance Plt & 8" Damp)
    Price:
    $219.99
    KT
    In Stock
    Item #:
    91510201
    Item Details:
    383/400 kit (includes balance plate and 8" damper)
    Please allow 24-48 hrs for a kit to ship w/ this labor option.
    Open Kit Components
    - Selection of individual components may be necessary for kit purchase.
    Kit Components
    Labor-Balance Rotating Assy
    Item #:
    91600016
    1
    Side Clearance 8 Rods
    Item #:
    91600017
    1
    SBC 400 Harmonic Balancer - 8" Diameter - Steel
    Item #:
    91015400
    1
    1955-85 S/B Chevy Balancing Plate for 2 Piece Rear Main Seal Design
    Item #:
    91615375
    1
     
    (0 Rating)
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