Speedmaster Chevy 400 4-Bolt Billet Main Bare Iron Engine Block; 4.125-Inch Bore

If your standard Bowtie block could handle 1500+ HP it would be Speedmaster's H1 engine block. Design from the ground up based upon your favourite bowtie block with the ability to handle naturally aspirated, supercharged, turbocharged and nitrous applications. | Brand:Speedmaster
Part Number:1-286-011-01
Part Type:Engines, Bare Block
Cylinder Bore Diameter:4.125 in.
Bore & Stroke:4.185 in. x 4.000 in. Max Recommended
Cam Journal OD:Standard SBC - 1.869
Cam Plug:2.375 in. Dia. Cup Plug
Cylinder Wall Thickness:0.275 in. min @ 4.185 in. Bore
Deck Height:9.025 in.
Deck Thickness:0.675 in. Min
Fuel Pump :Standard Mechanical Provision
Fuel Pump Pushrod:Standard Length
Freeze Plugs:10 x 1-5/8 in. Press In Cup Plugs
Lifter Bores:SBC 0.8427-0.8437 in.
Main Bearing Size:2.650 in. (SBC 400)
Main Bearing Bore:2.849 in. (SBC 400)
Main Cap Bolts:#1 7/16 in. (2) 3/8 in. (2)
#2, 3, 4 7/16 (2) Splayed (2)
#5 7/16 in. (2) 3/8 in. (2)
Main Cap Press:0.005 in.
Main Caps:All 5 Billet Steel. 3 Center Caps Splayed
Main Cap Register:Deep Stepped Register (No Need for Dowels)
Oil System:Wet Sump - Main Priority Oiling (Can Use Dry Sump)
Oil Pump Shaft:350 0.481 in. OD - Standard
Oil Filter:SBC

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