Chevrolet and GM Performance Parts - Aluminum V8 Block for Big Displacement Engines

Chevrolet - CHEVY BARE BLOCK TALL DECK SMALL BLOCK V8 BIG DISPLACEMENT

This tall deck (9.525”) aluminum block can be bored to (4.160”) and stroke to (4.125” with minor modification and 4.250” stroke with major modifications). The deck height is 9.525” with a 1.125” deck surface that can be machined as low as 9.000”. The bores start at 4.119” and can be bored to 4.160” with a 2.65” (400-type) main bearing size.

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Updated 09-09-2004.

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ALUMINUM V8 BLOCK FOR BIG DISPLACEMENT ENGINES

Aluminum V8 Cylinder Case P/N 24502495 This tall deck (9.525”) aluminum block can be bored to (4.160”) and stroke to (4.125” with minor modification and 4.250” stroke with major modifications). The deck height is 9.525” with a 1.125” deck surface that can be machined as low as 9.000”. The bores start at 4.119” and can be bored to 4.160” with a 2.65” (400-type) main bearing size. The camshaft bearings are special big block size from Federal Mogul (P/N: 1811M) and the camshaft is raised 0.391” from production location. Pan rails are spread 0.400” per side for clearance of connecting rods. The main caps are four-bolt design of 8620 steel with the three inner middle caps having ball-end outer studs that are angled outward at 20° to anchor the caps to the strongest part of the block. The four-bolt front and rear caps have straight outer bolts for oil pan clearance. The main cap hardware includes premium bolts, centerless ground studs and 12-point nuts. The rear main uses a 400-type two-piece rear seal (Fel-Pro P/N: 2909). This block uses a priority main oiling system and is a dry sump design with no provisions for an internal oil pump. The oil filter pad is eliminated so the starter can be mounted on either side and the fuel pump boss is also removed. Technical Note: Special oil pan, camshaft, and timing chain are required for this block. Use cam bearing kit P/N 12370843.
Specifications:
Block Material: Cylinder Wall Type: Cylinder Deck Height: Cylinder Bore Range: No. Bearing Cap Bolts: Cap Bolt Orientation: Bearing Cap Type:	Aluminum Siamesed 9.525” 4.119”-4.160” 4 Splayed 20° 8620 Steel	Crankshaft Journal Dia.: Oil Sump Type: Crankshaft Seal Type: Design Max. Stroke: Weight (lbs. - bare): Intended Max. Hp @ RPM: Intended Usage:	2.65” Dry 2 piece 4.125” 101 850 @ 8000 Professional Competition