Engine Blocks
Click on the part number to check pricing or place an order.
Dart
Big M Cast Iron Big Block
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- Siamesed extra-thick cylinder walls resist cracking & improve ring seal (minimum .300" thick with 4.625" bore).
- Scalloped outer water jacket walls improve coolant flow around the cylinder barrels to equalize temperatures.
- Standard 9.800" and extra-tall 10.200" deck heights available for stroker engines.
- Four-bolt main bearing caps in steel or ductile iron have splayed outer bolts for extra strength.
- Crankshaft tunnel has clearance for a 4.500" stroke crank with steel rods without grinding.
- True "priority main" oil system lubricates the main bearings before the lifters.
- Oil filter pad is drilled and tapped for an external oil pump.
- Rear four-bolt cap uses standard oil pump and two-piece seal - no
adapter required.
- Lifter valley head stud bosses prevent blown head gaskets between head bolts.
- External block machining reduces weight without sacrificing strength.
- Mechanical fuel pump boss, clutch linkage mounts, and side and front
motor mounts simplify installation in any chassis.
- Dual oil pan bolt patterns fit standard and notched oil pans.
- Bellhousing flange and rear main bearing are reinforced with ribs to
resist cracks.
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