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Forged Street Small Block Chevy 377 Rotating Assembly, 5.7 Inch Rods

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Specs
Sold in Quantity:
Kit
Stroke:
3.48
Main Journal Style:
400 mains
Rod Journal Diameter:
2.10"
Rear Main Seal Style:
2-piece
Wrist Pin Diameter:
.9272
Piston Ring Style:
C
Connecting Rod Length:
5.700"
Piston Weight:
541
Wrist Pin Weight:
132
Piston Style:
Dish
Piston Material:
Forged Aluminum
Garage Sale:
No
Main Journal Diameter:
2.650
Bearing Undersize:
Standard
Narrowed Bearing:
Yes
Bearing Construction:
Bi-metal
Coated Bearing:
No
Crankshaft Material:
Forged 4340 Steel
Connecting Rod Type:
I-Beam
Connecting Rod Material:
Forged 4340 Steel
Connecting Rod Bolt Diameter:
7/16"
Connecting Rod Weight:
590
Forged Street Small Block Chevy 377 Rotating Assembly, 5.7 Inch Rods

Click image to enlarge

Please NOTE the following about this product:

  • This item is sold as a kit.

Details

Reviews

Q & A

What's in the Box

These rotating assembly engine rebuild kits are designed for street use and include Keith Black forged pistons, Scat 4340 Pro-Comp I-beam rods and a Scat 4340 forged crankshaft.

All Scat 4340 cranks are 2-piece rear main seal, internally balanced and weigh approximately 51-55 lbs.

These assemblies will require balancing either by us or your machine shop.  All kits can be internally balanced.

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. 

Rings and bearings not included. Journals are standard size. Due to larger journal side radius on this aftermarket crankshaft, you must use Clevite H-series, King bearings or equivalent.  Includes spacers for main bearings.

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

Item Details

Includes spacers for main bearings

Notes

Kit includes:

  • Scat 4340 Forged Steel Crankshaft
    • Straight shot and chamfered oil holes
    • Nitride hardened and shot peened
    • Lightening holes in all rod throws
    • Large radius on all journals
  • Scat Pro Comp 4340 I-Beam Rods
    • Stroker clearanced
    • ARP 7/16" cap screw bolts
    • Bushed pin
    • 5.7" rod: 628 grams
    • Crank pin: 2.100"
    • Wrist pin: .927"
    • B.E. width: .940"
    • Set of 8 rods
  • KB Signature Series Forged Pistons
    • Dished
    • 2618 aluminum alloy construction
    • T-6 heat treated 
    • 4.000" bore pistons available in standard, .030, .040, or .060 sizes
    • 4.125" bore pistons available in standard, .030 or .040 sizes

 

Customer Reviews

This product has no reviews.

Product Q&A

3 questions : 3 answers

1 answers

350 block or 400 block for 377 how do you buld a 377? What block 350 or 400?

fathead
April 29, 2013

350 block or 400 block for 377 how do you buld a 377? What block 350 or 400?

Answers

April 29, 2013
Jason
The 377 pistons are for a 4-125" bore block, or a small block 400
1 answers

need single rear main seal 377 crank

trinidad & tobago ,west indies.
October 13, 2011

need single rear main seal 377 crank

Answers

October 14, 2011
Jason
I do not offer this crank in a rotating assembly but do offer the crank only, part #91510526
1 answers

I'm in the process of rebuilding a 1968 Chevy 327. Will the Forged Street Small Block Chevy Rotating Assembly with 5.7" rods work in this motor without any grinding ?

Pete
Clovis, CA
December 30, 2011

I'm in the process of rebuilding a 1968 Chevy 327. Will the Forged Street Small Block Chevy Rotating Assembly with 5.7" rods work in this motor without any grinding ?

Answers

January 02, 2012
John
These rotating assemblies are for the 350 inch motors and up. If you have the early 327 you may have the small journal block in which case the larger diameter journals on these cranks will not work without machine work to your block. If you opt for the 383 stroker crank and the necessary machine work then the block will need to have some grinding done in the area of the pan rail for rod clearance.
Page 1 of 1

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Item Details

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Item Details

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These assemblies will require balancing either by us or your machine shop.  All kits can be internally balanced.

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. 

Rings and bearings not included. Journals are standard size. Due to larger journal side radius on this aftermarket crankshaft, you must use Clevite H-series, King bearings or equivalent.

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These assemblies will require balancing either by us or your machine shop.  All kits can be internally balanced.

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All Scat 4340 cranks are 2-piece rear main seal, internally balanced and weigh approximately 51-55 lbs.

These assemblies will require balancing either by us or your machine shop.  All kits can be internally balanced.

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. 

Rings not included. Journals are standard size. Due to larger journal side radius on this aftermarket crankshaft, you must use Clevite H-series, King bearings or equivalent.  Includes spacers for main bearings.

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

Item Details

Includes spacers for main bearings
Green Plastigauge for Bearing Clearance, .001-.003 Inch
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(Part #757M909H-STD)
                        

Clevite's H-Series was developed primarily for use in NASCAR type racing, but they are suitable for all types of competition engines. These sets are specifically for 1969-Up 302-305-327-350 S/B Chevy.

  • Use H-series bearings with crankshafts that have oversize fillets and where engines run in the medium to high RPM range.
  • H-Series bearings should be used if contact patterns obtained with P-series parts are too narrow. Contact pattern should ideally cover 2/3 to 3/4 of the bearing surface.
  • If you aren't sure which type of performance bearing to start with, the H-Series will be your best choice.

H-Series Features (Link)