Since founder Vic Edelbrock Sr. began building performance intake manifolds in 1938, Edelbrock has grown into one of the most trusted names in American high-performance parts, from carburetors and intake manifolds to cylinder heads, crate engines, and EFI systems. JEGS has spent decades supplying Edelbrock components to racers, engine builders, and street enthusiasts, backing this extensive lineup with in-house technical support, fast shipping, and a Price Match Guarantee so you can choose proven Edelbrock parts with confidence.

Stop searching through junkyards and swap meets for the now-scarce factory 4-bolt main engine blocks. Edelbrock's Small Block Chevy Cast Iron Engine Blocks are a direct replacement, with some upgrades, compared to GM's original blocks. No special cylinder heads, intake manifold or oil pans required! Edelbrock blocks use all the factory spec engine components and accessories. Designed for applications up to 700 hp, The basic foundation includes nodular iron main caps with splayed 4-bolt design, main priority oiling, mechanical fuel pump boss, and clutch linkage boss. Edelbrock uses this block to build their very own Big Block Chevy crate engines. Edelbrock Engine Blocks are an ideal base to build horsepower for both street and bracket racing.

Features:

• High Quality Cast Iron
• Clearanced for a 3.750" Stroke
• 2-Piece Rear Main Seal Block has a Standard Bore of 4.125", Maximum Bore of 4.185" has a 0.260" Cylinder Wall Thickness
• 1-Piece Rear Main Seal Block has a Standard Bore of 4.000", Maximum Bore of 4.060" has a 0.230" Cylinder Wall Thickness
• 4-Bolt Splayed Nodular Iron Main Caps
• All Center Main Bolts Use a 7/16-14 Thread Bolt. All Outer Main Bolts Use a 3/8-16 Thread Bolt
• 7/16-14 Cylinder Head Bolt Threads (Head bolt holes extend into the water jackets)
• Standard Cam Location
• Block is Machined for Either Early Style with No Cam Retainer, or Late Style with a Cam Retainer
• Accepts Either an Early 10-Bolt Timing Cover, or a Late Style Plastic 8-Bolt Cover
• Standard Provisions for Mechanical Fuel Pump Utilizing a Standard Length Fuel Pump Pushrod
• Oil Filter Mounting Boss is Designed for a Bolt-On Oil Filter Adapter (included) and has a Built-In Oil Bypass
• Starter Mounting Pad is Drilled for Both Straight Across and Staggered Bolt Patterns
• Drilled and Tapped for Side and Front Engine Mounts in OEM Locations
• Passenger Side Dipstick Only, 1981 to 1985 Style for 2-Piece Rear Seal Blocks, 1986 and Later Style for 1-Piece Rear Seal Blocks
• Cast and Precision Machined in the USA!

Specifications:

• Material: Cast Iron
• Deck Height: 9.025"
• Bore Size: 4.125" (p/n 350-450020); 4.000" (p/n 350-450021)
• Cam Bearing Bore I.D.: 2.00"
• Cam Position: Standard SB-Chevy
• Hydraulic Roller Cam Provisions: Yes
• Head Bolt Pattern: Standard SB-Chevy
• Inside Head Stud Bosses: No
• Lifter Bores: Standard SB-Chevy
• Main Bearing Size: Standard SB-Chevy 400 (p/n 350-450020); Standard SB-Chevy 350 (p/n 350-450021)
• Main Bearing Bore: 2.8406" - 2.8416" (p/n 350-450020); 2.6406" - 2.6416" (p/n 350-450021)
• Main Caps: Nodular Iron, 4-Bolt Splayed
• Oil System: Main Priority
• Oil Cooler Holes: None
• Rear Main Seal: 2-Piece (p/n 350-450020); 1-Piece (p/n 350-450021)
• Stud and Bolt Holes: Through to Water
• Tapped Holes: Standard Thread
• Timing Chain / Gears: Standard SB-Chevy
• Timing Cover: 8- or 10-Bolt
• Fuel Pump Boss: Yes
• Starter: Standard Location
• Clutch Linkage Boss: Yes