This SBC-compatible bare block is a stout foundation for high-displacement small block Chevy builds up to 454 c.i., featuring a rigid iron casting, thick cylinder walls, and builder-friendly machining allowances for reliable street or track combinations.

Blueprint Engines BPP12110353 Features:

• Supports combinations up to 454 c.i. maximum
• Cylinder bore [rough] 3.989-3.991 in.; maximum bore 4.250 in.
• Siamese water jacket style
• Cylinder wall thickness .230 in. nominal at maximum bore
• Deck height 9.025 in. [+0.005/-0.000 in.]; deck thickness .600 in. nominal
• Cylinder skirt length 5.800 in. nominal
• 350 main bearing bore [line honed] 2.6402-2.6410 in.
• Cast iron 4-bolt splayed main caps
• Main cap bolts 7/16-14 inner and 3/8-16 splayed; main fastener tensile strength 180,000-210,000 PSI
• Lifter bores .8437 in. +/- .0003 in.; OEM lifter retainer w/ roller provisions
• Camshaft position OEM; cam drive/timing set OEM equivalent; cam retaining plate OEM
• Cam bearings Durabond GMP-8 (sold separately); cam bearing bore ID 2.000 in. +/- .001 in.
• Priority main oil system; OEM oil pump; OEM oil filter; OEM oil pan
• 1-piece rear main seal; OEM starter; OEM timing cover
• Freeze/core plugs 1-5/8 in. x 10
• Head bolt/stud threads 7/16-14 UNC
• Cast-in stroke clearance up to 3.875 in.
• Block material EN-GJL-250 iron
• Approximate weight with main caps 170-190 lbs.