Dart Special High Performance Blocks

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Why waste time sourcing, cleaning, machining, and prepping an old core in hopes it'll be usable when you could be guaranteed a new quality block without the expense of a full-race unit? Dart Special High Performance Blocks enable you to affordably build a powerful and durable engine.

Features

Designed for compatibility with stock components

Virtually ready to assemble right out of the box after a final cylinder hone

Precision machined from high-nickel cast iron

Decks even and parallel within .002"

Siamese bores 4.000" OR 4.125" (unfinished)

Cylinder walls .230" minimum at 4.165"

Clearance for 3.75" stroke using steel rods

Priority main oiling system

2-piece rear main seal

350 main journals

Splayed 4-bolt center three main caps

Blind head bolt holes