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Pontiac SD-455 Block Repair - Damage Control - Pontiac Tech
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| Engine Buildup Worksheet SD-455 | | Engine | | Engine Displacement | 463.3 ci | | Horsepower | 405 at 5,100 rpm | | Torque | 478 at 3,900 rpm | | Bore/Stroke | 4.185x4.21 | | Bore/Stroke Ratio | 0.994 | | Rod/Stroke Ratio | 1.574 | | Bottom End | | Block Description | XD-code No. 491132 Super Duty | | Year | '73 | | Preparation | Bored 0.035 in | | Deck Height | Zero | | Crankshaft | No. 9799103 nodular-iron, 4.21-in stroke | | Preparation | Main journals turned 0.020 in, rod journals turned 0.030 in, fully polished | | Balancer | Stock Pontiac | | Rods | Original Super-Duty, forged steel, 6.625-in length | | Preparation | Resized and bushed for full-floating wristpins | | Bearings | Clevite 77 No. MS667P-20 main journal, Clevite 77 No. CB758P-30 rod journal | | Pistons | JE SRP No. 149721 | | Piston-To-Deck Height | 0.003-in positive | | Piston Pins | JE full-floating | | Piston Rings | JE No. J100F8-41855 plasma-moly | | Fasteners | Original Pontiac | | Balanced | Yes | | Oiling System | | Windage Tray | No | | Crank Scraper | No | | Oil Pan | Original | | Oil Pump | Melling M54F | | Heads | | Casting Number | No. 16 Super-Duty 455 | | Chamber | Open | | Head Mods | None | | Combustion Chamber Volume | Approx 105 cc | | Flow At 28 Inches | Approx 240/180 cfm at 0.550 in | | Compression Ratio | 9.0:1 | | Valves | Original Super-Duty 2.11/1.77-in | | Angles | Multi-angle with 45-degree seats | | Retainers | Original | | Keepers | Original | | Valve Guides | Replacement cast-iron | | Valve Seals | Positive | | Rocker Studs | ARP 7⁄16-in | | Rocker Arms | Stamped steel, 1.65:1 | | Pushrods | Original |
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