Engines and Components› Engines, Blocks and Components

Dart

IRONBIG MSTEELSTD.9.84.6

$3,319.27

SKU: D00Q 31263644

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Special Order
Ships in 4–6 weeks
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Professional / shop required

Description

Engineered for high-performance Big Block Chevy applications, the Dart 31263644 Big M Iron Engine Block features ductile iron 4-bolt main caps and siamesed, extra-thick cylinder walls. It is designed to accommodate +.300 in. tall GM Gen VI style lifters and offers crankshaft tunnel clearance for a 4.500 in. stroke with steel rods without grinding. This block also includes a true priority main oiling system and a 2-piece rear main seal.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandDart
Part NumberD00Q 31263644

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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