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427/454 Bare Block
•New design casting incorporating the best designs of Mark IV and Gen VI
•Production type cast-iron 4-bolt block
•4.250" finished bore
•4.310" max bore (non-siamese bore)
•Machined fuel pump pad
•New water jackets for use with Mark IV or Gen VI 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
Specs:
•Part Number: 19170538
•Casting Number:
•Deck Height: 9.800"
•Fuel Pump Boss: Yes
•Cylinder Wall: Open
•Bore Range: 4.250" - 4.310"
•Main Bolt: 4
•Main Bolt Degree: Straight
•Cap Material: Cast-Iron
•Crank Journal Diameter: 2.750"
•Oiling: Wet
•Seal Type: 1 Piece
•Max Stroke: 4.250"
•Weight (lbs): 247
•Max HP: 700
•Usage: Street
California Proposition 65 Warning
| Categories | Crate Engines, Engine Components |
|---|---|
| Weight | 112.0300 |
| Manufacturer Part Number | GM19170538 |
| Brand | GM Performance |
| Part Type | Engine Blocks |
| Vehicle Make | Chevrolet |
| Engine Type | Big Block |
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