Machined Dart Big "M" Sportsman Chev BB Cast Iron Block
These blocks are finished machined, ready for assembly. They bored, honed and parallel decked. Features extra thick walls (.300" with 4.625" bore), scalloped water jackets for improved cooling, ductile iron splayed 4-bolt main caps, priority main oiling, lifter valley head stud bosses help prevent blown head gaskets and dual oil pan bolt patterns. External block machining reduces weight without sacrificing strength. Oil filter pad is drilled and tapped for external oil pump. Bell housing flange and rear main are reinforced with ribs to resist cracks.
Part Type: Engine Block
Application: Chevrolet Big Block
Engine Block Style: Aftermarket
Engine Block Material: Cast Iron
Main Journal Type: 454 Main
Deck Height: 9.800"
Cylinder Bore as Shipped: 4.600"
Cylinder Bore Diameter: 4.600"
Finished Cylinder Bores: Yes
Main Caps Included: Yes
Main Cap Material: Ductile Iron
Main Bolt Style: 4-Bolt
Main Cap Fasteners Included: Yes
Lifter Bore Diameter: .842"
Camshaft Bore: Standard
Provisions for OE Roller Lifters: No
Main Bearings Included: No
Rear Main Seal Style: 2-Piece
Oil Pan Rail Type: Stock/OE
Raised Cam Location: No
Cam Bearings Included: No
Freeze Plugs Included: No
Manufacturer: Dart Machinery
Manufacturer's Part Number: 31273644-2
Weight: 250.0 lbs.
Warranty: Dart Machinery, Ltd. warrants to the original purchaser its products to be free from defects in materials and workmanship within 6 months from the date of sale. Dart's obligation under this warranty shall be limited to repair or replacement, at Dart's option, of any parts or products which may prove defective under normal use. This warranty shall not apply to any parts or products which hhave been subject to accident, negligence, alteration, abuse, or misuse.
Quantity: Sold as Each
*This Block Qualifies for Free Freight!
(48 U.S. Contiguous only. Residential/Lift Gate Fees may apply.) |