High-performance Chevrolet 454 big-block engine block featuring Mark IV architecture, precision-machined 4.250-inch bore, and 9.8-inch deck height for custom builds.

Description

Chevrolet Performance BBC Mark IV 454 Block 4.250 Bore / 9.8 Deck, This GM Performance 454 block has 4 bolt mains with a 9.8 (short deck) deck height, The maximum this block can be bored too is 4.310 and max stroke is 4.250 making a 496 cubic inch big block chevy. perfect foundation for any hot rod, drag car or boat!

• GM Performance Big Block Chevy 454 Mark IV / GEN VI Block
• Bare Block 
• 4.250 Bore
• 4.240 Bore As Shipped
• 4.310 Max Bore 
• 4.250 Max Stroke 
• 4 Bolt Main 
• 1 Piece Rear Main Seal 
• 9.8 Deck Height ( Short Deck)
• Weighs 246 Pounds
• Iron Block 
• Each

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