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| Engine Buildup Worksheet | | Engine | | Engine Displacement | 473.5 ci | | Peak Horsepower | 578 at 5,500 rpm | | Peak Torque | 588 lb-ft at 4,700 rpm | | Bore/Stroke | 4.212x4.25-in | | Bore/Stroke Ratio | 0.991:1 | | Rod/Stroke Ratio | 1.60:1 |
| Bottom End | | Block Description | YC-code No. 485428 | | Year | ’71 | | Block Preparation | Bored 0.060-in | | Deck Height | Zero | | Crankshaft | Butler Performance, forged-steel, 4.25-in stroke, 3.25-in main journal, 2.20-in rod journal | | Crank Preparation | Normal | | Main Caps | Pro-Gram Engineering, No. PRO-P455F front, No. PRO-P455C center three, No. PRO-P455R rear | | Main Bearing Clearance | 0.003 in | | Balancer | Performance Street Balancer No. PBO-PB1056ST | | Rods | Eagle Specialty Products, forged-steel, H-beam, 6.800-in length, 7/16-in ARP bolts | | Bearings | Federal Mogul No. 151M-STD main journal, Federal Mogul 8-7200CH-STD rod journal | | Piston | Ross custom, forged-aluminum, 4.211-in diameter, flat-top, 439.5 grams, 8.5cc reliefs | | Piston to Deck Height | Zero | | Piston Pins | Ferrea No. P70028-8, forged-alloy, 0.990-in diameter, 138 grams | | Piston Rings | Total Seal No. CR3455-65, plasma-moly, file-fit, 0.018-in gap | | Fasteners | ARP 194-5601 four-bolt main-stud kit | | Balanced | Yes |
| Oiling System | | Windage Tray | No | | Crank Scraper | No | | Oil Pan | Canton No. 15-450, road-race | | Oil Pump | Melling M54F | | Oil | Shell Rotella 30W |
| Heads | | Casting Number | Edelbrock No. 60569-2 | | Chamber | Open, hand-smoothed | | Combustion Chamber Volume | 90 cc’s | | Compression Ratio | 9.95:1 | | Head Mods | Fully ported intake and exhaust ports | | Intake Port Volume | Approx. 220 cc’s | | Intake/Exhaust Flow Ratio | 75 percent | | Intake/Exhaust Flow at 28-in: | | | 0.200 | 140/86 cfm | | 0.300 | 201/173 cfm | | 0.400 | 258/199 cfm | | 0.500 | 292/217 cfm | | 0.600 | 312/230 cfm | | 0.700 | 316/236 cfm | | Intake Valve | Ferrea No. 5073, stainless steel, 2.11-in, 5.100-in length | | Exhaust Valve | Ferrea No. 5144, stainless steel, 1.77-in, 5.100-in length | | Angles | Multi-angle with 45-deg seats | | Retainers | Comp Cams No. 740-16, 10 deg | | Locks | Comp Cams No. 611-16, 10 deg | | Valvesprings | Lunati No. 73100-16 | | Install Height | 1.79 in | | Seat Pressure | 137 psi | | Open Pressure | 338 psi | | Valveguides | Bronze, 0.530-in diameter | | Valve Seals | Viton | | Rocker Studs | ARP No. 100-7101, 7/16-in | | Rocker Arms | Comp Cams No. 19060, full roller | | Rocker Ratio | 1.5:1 | | Pushrods | Butler Performance No. SBR-581-R-16, 5/16-in diameter, 8.80-in length, chrome-moly | | Fasteners | ARP No. 190-3605 head-bolt kit |
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