Availability
Bare Blocks, Dart Big M Sportsman Series, Cast Iron,10.200 in. Deck Height, 4.250 in,Bore,4-Bolt Main,2-Piece Rear Main Seal, Big Block, Chevy, Each
Part Number: DRT-31223355
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Bare Blocks, Dart Big M Series, Cast Iron,10.400 in. Deck Height, 4.250 in,Bore,4-Bolt Main,2-Piece Rear Main Seal, Big Block, Chevy, Each
Part Number: DRT-31223395
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Bare Blocks, Dart Big M Sportsman Series, Cast Iron,9.800 in. Deck Height, 4.250 in,Bore,4-Bolt Main,2-Piece Rear Main Seal, Big Block, Chevy, Each
Part Number: DRT-31223445
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Bare Blocks, Dart Big M Sportsman Series, Cast Iron,10.200 in. Deck Height, 4.500 in,Bore,4-Bolt Main,2-Piece Rear Main Seal, Big Block, Chevy, Each
Part Number: DRT-31223455
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Bare Blocks, Dart Big M Sportsman Series, Cast Iron,9.800 in. Deck Height, 4.560 in,Bore,4-Bolt Main,2-Piece Rear Main Seal, Big Block, Chevy, Each
Part Number: DRT-31223545
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Bare Blocks, Dart Big M Sportsman Series, Cast Iron,10.200 in. Deck Height, 4.560 in,Bore,4-Bolt Main,2-Piece Rear Main Seal, Big Block, Chevy, Each
Part Number: DRT-31223555
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Bare Blocks, Dart Big M Sportsman Series, Cast Iron,9.800 in. Deck Height, 4.600 in,Bore,4-Bolt Main,2-Piece Rear Main Seal, Big Block, Chevy, Each
Part Number: DRT-31223645
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Bare Blocks, Dart Race Series, Aluminum, 9.500 in. Deck Height, 4.180 in Bore, 4-Bolt Mains, 2 Piece Rear Main Seals, Chevy Small Block, Each
Part Number: DRT-31511332
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Bare Blocks, Dart Race Series, Aluminum, 9.075 in. Deck Height, 4.180 in Bore, 4-Bolt Mains, 2 Piece Rear Main Seals, Chevy Small Block, Each
Part Number: DRT-31511342
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Bare Blocks, Dart Race Series, Aluminum, 8.850 in. Deck Height, 4.180 in Bore, 4-Bolt Mains, 2 Piece Rear Main Seals, Chevy Small Block, Each
Part Number: DRT-31511352
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Bare Blocks, Dart Big M Sportsman Series, Cast Iron,10.200 in. Deck Height, 4.600 in,Bore,4-Bolt Main,2-Piece Rear Main Seal, Big Block, Chevy, Each
Part Number: DRT-31223655
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Bare Blocks, Dart Big M Series, Cast Iron,10.400 in. Deck Height, 4.560 in,Bore,4-Bolt Main,2-Piece Rear Main Seal, Big Block, Chevy, Each
Part Number: DRT-31223695
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Block, Cast Iron, 4-Bolt Mains, 4.250 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Big Block, Each
Part Number: DRT-31264345
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Bare Blocks, Dart Big M Series, Aluminum, 10.20 in. Tall Deck, 4.250 in. Bore. 4-Bolt Mains, 2 Piece Rear Main Seal, Chevy, Big Block, Each
Part Number: DRT-31264354
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Block, Race Series, Aluminum, 4-Bolt Mains, 10.2 Deck, 4.250 in. Dia., Bore, 2-Piece Seal, Chevy, Each
Part Number: DRT-31264355
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Bare Blocks, Dart Race Series, Aluminum, 9.025 in. Deck Height, 4.180 in Bore, 4-Bolt Mains, 2 Piece Rear Main Seals, Chevy Small Block, Each
Part Number: DRT-31511312
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Bare Blocks, Dart Race Series, Aluminum, 9.025 in. Deck Height, 4.180 in Bore, 4-Bolt Mains, 2 Piece Rear Main Seals, Chevy Small Block, Each
Part Number: DRT-31511313
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Bare Blocks, Dart Race Series, Aluminum, 9.325 in. Deck Height, 4.180 in Bore, 4-Bolt Mains, 2 Piece Rear Main Seals, Chevy Small Block, Each
Part Number: DRT-31511322
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Bare Blocks, Dart Race Series, Aluminum, 9.025 in. Deck Height, 4.180 in Bore, 4-Bolt Mains, 2 Piece Rear Main Seals, Chevy Small Block, Each
Part Number: DRT-31512312
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Bare Blocks, Dart Race Series, Aluminum, 9.025 in. Deck Height, 4.180 in Bore, 4-Bolt Mains, 2 Piece Rear Main Seals, Chevy Small Block, Each
Part Number: DRT-31512313
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Block, Cast Iron, 4-Bolt Mains, 4.000 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Small Block, Each
Part Number: DRT-31122111
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Block, Cast Iron, 4-Bolt Mains, 4.000 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Small Block, Each
Part Number: DRT-31122112
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Block, Cast Iron, 4-Bolt Mains, 4.000 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Small Block, Each
Part Number: DRT-31122121
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Block, Cast Iron, 4-Bolt Mains, 4.000 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Small Block, Each
Part Number: DRT-31122122
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Engine Block, Cast Iron, 4-Bolt Mains, 4.125 in. Diameter Bore, 2-Piece Rear Main Seal, Chevy, Small Block, Each
Part Number: DRT-31122212
Not Yet Reviewed
Estimated Ship Date: Nov 10, 2025 if ordered today
Estimated Ship Date: Nov 10, 2025 if ordered today
Modal Header
Call To Order
This is a custom order part. You can order this part by Contacting Us.