SKU: DRT-31213544
ONE IN STOCK!
BB Chevy, Dart block, Dart Big M Block, 9.800 Deck Height, 4.560 Bore, Billet Steel Main Caps, Engine Block, 2pc Rear Seal, Ships from Dart
- PRE M2 Block Series
- 9.800” deck height
- 4.560” bore, Max bore is 4.625 size, Siamese extra thick cylinder walls to resist cracking and improve ring seal (minimum .300” thick with 4.625” bore).
- Uses +.300” tall Gen VI style lifters
- 4-bolt billet main bearing caps have splayed outer bolts for extra strength
- 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.
- Lifter valley head stud bosses prevent blown head gaskets
- Dual oil pan bolt patterns fit standard and notched oil pans.
- Big M: Parts kit included (PN 32000039 )
- 220 BHN Cast iron material