454 Bare Block Engine Block, Cast Iron, 4-Bolt Mains, 4.250 in. Diameter Bore, 1-Piece Rear Seal
GM Performance Parts 19170538, 427 / 454 Bare Engine Block
Part #
19170538
Price: $1,351.00
Quantity:
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• New casting incorporating the best designs of Mark IV and Gen VI
• Production type cast iron 4-bolt block
• 4.25" finished bore
• 4.31" max bore (non-siamese bore)
• Machined fuel pump pad
• New water jackets for use with Mark IV heads
• Revised oiling to allow for bigger cam bearings/cam lift
• Bolt boss (not machined) added near distributor hole like 8.1L
• Can be drilled for use with 10-bolt front timing cover
• Additional clearance added for roller timing chains
• Auxiliary oil pressure line added to front of block
• Racing style oil filter cast feature with added oil pressure port
• Additional boss for manual transmission clutch pivot (machined)
• Additional material added around lifter bosses


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