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Part# 31161111 4.000” Bore / 31161211 4.125” Bore
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Material: Superior iron alloy
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Bore: 4.00” or 4.125” unfinished
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Bore & stroke: 4.165” x 3.750” max recommended
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Cam bearing bore ID: SBC - 2.00”
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Cam bearings: Special coated, grooved, w/3 oil holes
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Cam Bearing O.S. + .010”, +.020”, +.030”
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Cam bearing press: .002”
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Cam journal OD: Standard SBC - 1.869”
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Cam Plug: 2 7/64” Shallow Cup
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Cylinder Wall Thickness: .230” min @ 4.165” bore
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Deck Height: 9.025”
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Deck Thickness: .625” min.
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Fuel Pump: Mechanical pump provision
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Fuel Pump Pushrod: Standard Length
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Freeze Plugs: Press in cup plugs - 1 5/8”
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Lifter Bores: SBC .8430” - .8440”
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Main bearing size: 2.450” (350)
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Main bearing bore: (350) 2.6405 – 2.6415
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Main Cap Bolts: #1 7/16” (2)
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#2, #3, #4 7/16” (2) 3/8” splayed (2)
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#5 7/16” (2)
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Main cap press: .005”
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Main caps: Class 35 Iron - 4 bolt, center 3
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Main cap register: Deep stepped register on each side (no need for dowels)
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Oil system: Wet Sump - Main Priority Oiling (can use dry sump)
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Oil Pump shaft: 350 main = Stock shaft (.481” OD)
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Oil Filter: Standard SBC filter, uses 2 bolt filter adapter
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Oil Pan: Standard SBC oil pan
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Rear Main Seal 350 main - std seal 2-piece
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Serial No. Left front & main caps
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Starter: Standard SBC
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Stud holes, Head: Blind holes
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Timing chain/gears Standard SBC components
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Timing Cover: Can use stock cover / Stamped Steel or Plastic
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Torque Specs: 7/16” bolts - 65 ft lbs
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3/8” bolts - 35 ft lbs
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Weight: 175 lbs @ 4.00” bore
