Engine Block

Dart Big M2 Iron Big Block Chevy Blocks

• Standard 9.800 and tall 10.200 deck heights
• Standard 4.250, 4.500, 4.560 or 4.600 bore sizes with siamesed extra thick cylinder walLS2 to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore)
• Uses +.300 tall Gen VI style lifters. Modification for Gen IV style available
• 4-bolt main bearing caps in Ductile Iron have splayed outer bolts for extra strength
• Lifter valley head stud bosses prevent blown head gaskets
• Dual oil pan bolt patterns fit standard and notched oil pans
• Parts kit sold separately
• True priority main oil system lubricates the main bearings before the lifters.
• Our stepped main oil gallery (9/16 to 1/2 to 7/16) increases the flow of oil to the crank at high RPM, and our front oil crossover eliminates internal oil leaks around the distributor shaft

Dart Big M2 Iron Big Block Chevy Blocks

• Standard 9.800 and tall 10.200 deck heights
• Standard 4.250, 4.500, 4.560 or 4.600 bore sizes with siamesed extra thick cylinder walLS2 to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore)
• Uses +.300 tall Gen VI style lifters. Modification for Gen IV style available
• 4-bolt main bearing caps in Ductile Iron have splayed outer bolts for extra strength
• Lifter valley head stud bosses prevent blown head gaskets
• Dual oil pan bolt patterns fit standard and notched oil pans
• Parts kit sold separately
• True priority main oil system lubricates the main bearings before the lifters.
• Our stepped main oil gallery (9/16 to 1/2 to 7/16) increases the flow of oil to the crank at high RPM, and our front oil crossover eliminates internal oil leaks around the distributor shaft

Dart Big M2 Iron Big Block Chevy Blocks

• Standard 9.800 and tall 10.200 deck heights
• Standard 4.250, 4.500, 4.560 or 4.600 bore sizes with siamesed extra thick cylinder walLS2 to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore)
• Uses +.300 tall Gen VI style lifters. Modification for Gen IV style available
• 4-bolt main bearing caps in Ductile Iron have splayed outer bolts for extra strength
• Lifter valley head stud bosses prevent blown head gaskets
• Dual oil pan bolt patterns fit standard and notched oil pans
• Parts kit sold separately
• True priority main oil system lubricates the main bearings before the lifters.
• Our stepped main oil gallery (9/16 to 1/2 to 7/16) increases the flow of oil to the crank at high RPM, and our front oil crossover eliminates internal oil leaks around the distributor shaft

Dart Big M2 Pro Iron Big Block Chevy Blocks

• Standard 9.800, 10.200 and 10.400" deck heights
• Standard 4.250, 4.500, 4.560, or 4.600 bore sizes with siamesed extra thick cylinder walLS2 to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore)
• Available in .400 raised cam
• Uses +.300 tall GEN VI style lifters. Modification for MRK IV style available
• 4-bolt main bearing caps in steel or ductile iron have splayed outer bolts for extra strength
• Lifter valley head stud bosses help prevent blown head gaskets
• Easy to install AN fitting oil gallery plugs

Dart Big M2 Pro Iron Big Block Chevy Blocks

• Standard 9.800, 10.200 and 10.400" deck heights
• Standard 4.250, 4.500, 4.560, or 4.600 bore sizes with siamesed extra thick cylinder walLS2 to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore)
• Available in .400 raised cam
• Uses +.300 tall GEN VI style lifters. Modification for MRK IV style available
• 4-bolt main bearing caps in steel or ductile iron have splayed outer bolts for extra strength
• Lifter valley head stud bosses help prevent blown head gaskets
• Easy to install AN fitting oil gallery plugs

Dart Big M2 Pro Iron Big Block Chevy Blocks

• Standard 9.800, 10.200 and 10.400" deck heights
• Standard 4.250, 4.500, 4.560, or 4.600 bore sizes with siamesed extra thick cylinder walLS2 to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore)
• Available in .400 raised cam
• Uses +.300 tall GEN VI style lifters. Modification for MRK IV style available
• 4-bolt main bearing caps in steel or ductile iron have splayed outer bolts for extra strength
• Lifter valley head stud bosses help prevent blown head gaskets
• Easy to install AN fitting oil gallery plugs

Dart Big M2 Pro Iron Big Block Chevy Blocks

• Standard 9.800, 10.200 and 10.400" deck heights
• Standard 4.250, 4.500, 4.560, or 4.600 bore sizes with siamesed extra thick cylinder walLS2 to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore)
• Available in .400 raised cam
• Uses +.300 tall GEN VI style lifters. Modification for MRK IV style available
• 4-bolt main bearing caps in steel or ductile iron have splayed outer bolts for extra strength
• Lifter valley head stud bosses help prevent blown head gaskets
• Easy to install AN fitting oil gallery plugs

Dart Big M2 Pro Iron Big Block Chevy Blocks

• Standard 9.800, 10.200 and 10.400" deck heights
• Standard 4.250, 4.500, 4.560, or 4.600 bore sizes with siamesed extra thick cylinder walLS2 to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore)
• Available in .400 raised cam
• Uses +.300 tall GEN VI style lifters. Modification for MRK IV style available
• 4-bolt main bearing caps in steel or ductile iron have splayed outer bolts for extra strength
• Lifter valley head stud bosses help prevent blown head gaskets
• Easy to install AN fitting oil gallery plugs

Dart Big M2 Pro Iron Big Block Chevy Blocks

• Standard 9.800, 10.200 and 10.400" deck heights
• Standard 4.250, 4.500, 4.560, or 4.600 bore sizes with siamesed extra thick cylinder walLS2 to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore)
• Available in .400 raised cam
• Uses +.300 tall GEN VI style lifters. Modification for MRK IV style available
• 4-bolt main bearing caps in steel or ductile iron have splayed outer bolts for extra strength
• Lifter valley head stud bosses help prevent blown head gaskets
• Easy to install AN fitting oil gallery plugs

Dart Big M2 Pro Iron Big Block Chevy Blocks

• Standard 9.800, 10.200 and 10.400" deck heights
• Standard 4.250, 4.500, 4.560, or 4.600 bore sizes with siamesed extra thick cylinder walLS2 to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore)
• Available in .400 raised cam
• Uses +.300 tall GEN VI style lifters. Modification for MRK IV style available
• 4-bolt main bearing caps in steel or ductile iron have splayed outer bolts for extra strength
• Lifter valley head stud bosses help prevent blown head gaskets
• Easy to install AN fitting oil gallery plugs

Dart Big M2 Pro Iron Big Block Chevy Blocks

• Standard 9.800, 10.200 and 10.400" deck heights
• Standard 4.250, 4.500, 4.560, or 4.600 bore sizes with siamesed extra thick cylinder walLS2 to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore)
• Available in .400 raised cam
• Uses +.300 tall GEN VI style lifters. Modification for MRK IV style available
• 4-bolt main bearing caps in steel or ductile iron have splayed outer bolts for extra strength
• Lifter valley head stud bosses help prevent blown head gaskets
• Easy to install AN fitting oil gallery plugs

Dart Big M2 Pro Iron Big Block Chevy Blocks

• Standard 9.800, 10.200 and 10.400" deck heights
• Standard 4.250, 4.500, 4.560, or 4.600 bore sizes with siamesed extra thick cylinder walLS2 to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore)
• Available in .400 raised cam
• Uses +.300 tall GEN VI style lifters. Modification for MRK IV style available
• 4-bolt main bearing caps in steel or ductile iron have splayed outer bolts for extra strength
• Lifter valley head stud bosses help prevent blown head gaskets
• Easy to install AN fitting oil gallery plugs

Dart Big M2 Pro Iron Big Block Chevy Blocks

• Standard 9.800, 10.200 and 10.400" deck heights
• Standard 4.250, 4.500, 4.560, or 4.600 bore sizes with siamesed extra thick cylinder walLS2 to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore)
• Available in .400 raised cam
• Uses +.300 tall GEN VI style lifters. Modification for MRK IV style available
• 4-bolt main bearing caps in steel or ductile iron have splayed outer bolts for extra strength
• Lifter valley head stud bosses help prevent blown head gaskets
• Easy to install AN fitting oil gallery plugs

Dart Big M2 Pro Iron Big Block Chevy Blocks

• Standard 9.800, 10.200 and 10.400" deck heights
• Standard 4.250, 4.500, 4.560, or 4.600 bore sizes with siamesed extra thick cylinder walLS2 to resist cracking and improve ring seal (minimum .300 thick with 4.625 bore)
• Available in .400 raised cam
• Uses +.300 tall GEN VI style lifters. Modification for MRK IV style available
• 4-bolt main bearing caps in steel or ductile iron have splayed outer bolts for extra strength
• Lifter valley head stud bosses help prevent blown head gaskets
• Easy to install AN fitting oil gallery plugs

Edelbrock part #450000 Big Block Chevy Siamese 4.50" Bore with a 9.80 Deck height, Cast Iron block with a two piece rear main seal

The Edelbrock Big-Block Chevy Block #4500009 is an unfinished bare cast-iron engine block with a rough bore size of 4.495-inches (+/- .001), a rough deck height of 9.813 inches (+/- .005), 2-piece rear main seal and Siamese bores.