Street Small Block Chevy 377 Rotating Assembly, Dish Dome, 6 Inch Rod
377 Chevy Small Block V8, 400 Chevy Small Block V8, 400 mains Main Journal Style
Build Your KitYou're almost there! This kit has an option or two for you to select. Let us know which options you want for your new kit.
These rotating assembly engine rebuild kits are designed for street use and include Keith Black Hypereutectic pistons, Speedway 5140 I-beam rods, main/rod bearings and a Speedway Cast Steel crankshaft. Rings not included. Journals are standard size. Includes spacers for main bearings.
Due to larger journal side radius on this aftermarket crankshaft, you must use Clevite H-series, King bearings (included in kit) or equivalent.
These assemblies will require balancing either by us or your machine shop.
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.
Item DetailsIncludes spacers for main bearings
- Speedway Cast Steel Crankshaft
- Two-piece rear main
- 80-60-06 cast steel
- Speedway 5140 I-Beam Connecting Rods
- Heat treated, shot peened and magnafluxed
- 6.0" length
- Set of 8 rods
- Bushed pin
- 597 grams
- KB Hypereutectic Dished Pistons
- T-5 heat treated aluminum construction
- 4.000" bore pistons available in .030, .040, or .060 sizes
- 4.125" bore pistons available in .030 or .040 sizes
- Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
What's In The Kit
Small Block Chevy 5140 Steel I-Beam Rods, 6.0 Inch, Bushed PinPart # 91015398Qty x 1
KB Chevy 377 Hypereutectic Pistons, Dish, 6.0 Inch RodPart # 474350Qty x 1
Speedway Chevy 350 Crankshaft, Two-Piece MainPart # 91515350Qty x 1
King MB5224AM 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 MB 509HP HP Series Chevy 400 Large Journal Main BearingsPart # 910509HP-STDQty x 1
More Like This
Premium SB Chevy Rotating Assembly, 400 .150 Dome, 6 In Rods
Forged Street SB Chevy 377 Rotating Assembly, 6 In I-Beam Rods
Forged Street SB Chevy 400 Rotating Assembly, 6 In I-Beam Rods
Street SB Chevy 350 Rotating Assembly, Dish Dome, 5.7 In Rod
Light Forged SB Chevy Rotating Assembly, 383 Dome, 6 In Rods
Light Forged SB Chevy Rotating Assembly, 350 Dome, 6 In Rods
Forged SB Chevy Rotating Assembly, 383 Dome, H-Beam, 6 In Rods
Premium SB Chevy Rotating Assembly, 350 .150 Dome, 6 In Rods
Street Small Block Chevy 350 Rotating Assembly, Dish Dome, 6 Inch Rod
Street SB Chevy 400 Rotating Assembly, Dish Dome, 5.7 In Rod
Q & A
Learn about the importance of getting the chain tension set correctly, and why it is critical that we get it as near perfect as we can. Walkthrough a basic procedure that effectively and consistently gets the chain tension set properly every time.
Step back in time with our modern reproduction of the iconic Chevy 461 double hump cylinder heads, now cast in lightweight aluminum! In this video, Joe and Wyatt discuss the features that bring the vaunted camel hump heads into the 21st Century.
In this Tech Tip, John discusses LT1 rotating assembly options for a customer looking to build a solid autoX, drag, and occasional strip powerplant for his Firebird.
Professional insight on some useful crate engine tools that will improve your engine building experience.
Check out this helpful piston ring style chart.
Follow along as Jeff installs Mr. Gasket aluminum finned valve covers and gaskets to his iron-head engine. Learn how to prep the covers for a fresh coat of engine paint!
Learn how to identfy motors for your LS Swap. In this guide we cover generation 4 small block engines and some of the cheaper options for more power.