Forged Street SB Chevy 377 Rotating Assembly, 6 In I-Beam Rods
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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 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 DetailsIncludes spacers for main bearings
- 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
- 6.0" rod: 629 grams
- Crank pin: 2.100"
- Wrist pin: .927"
- B.E. width: .940"
- Set of 8 rods
- KB Signature Series Forged Pistons
- 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
What's In The KitEach kit from Speedway Motors is carefully packaged and delivered right to your door. Below is a list of all the items you should expect to receive when you order this kit. Some of these items may also be available for sale individually if you're here looking for replacement parts.
Icon Chevy 377 Forged Pistons, Dish, 6.0 RodPart # 474764Qty x 1
Scat 26000716 Small Block Chevy 4340 I-Beam Rods, 6.0 Inch, Bushed PinPart # 91015232Qty x 1
Scat 435010 Chevy 350 Crankshaft, 4340 Forged, 3.48 Stroke, 350 MainPart # 91515500Qty x 1
Main Bearing Spacers - Small Block Chevy, 350 CrankPart # 5051120Qty x 1
King HP Series Chevy 350/400 Large Journal Engine Rod Bearings, StdPart # 910807HP-STDQty x 1
King HP Series Chevy 350 Large Journal Engine Main Bearings-StandardPart # 910557HP-STDQty x 1
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