425 HP, 500 ft/lbs TQThis GM Performance big block 454 HO is an awesome value, ready for an easy transplant into your classic muscle car or street rod! It is a Gen VI-based block with a conventional-style mechanical fuel pump boss, and it sounds much like the performance big blocks of the 1960s. The engine has a windage tray, one-piece rear main seal, and high-speed single roller timing chain. An 8.75:1 compression ratio means you've got an engine that's satisfied on today's premium fuel with no appetite for lead, octane boosters, or other fuel additives.
SPECIFICATIONS
425 HP @ 5250 RPM500 ft/lbs @ 3250 RPM8.75:1 Compression RatioCast-Iron Four Bolt Main BlockForged Steel CrankshaftForged Steel Connecting RodsHydraulic Roller Cam (Lift .510" Int/.540" Exh, Duration @ .050" 211° Int/230° Exh)Cast Iron Rectangular Port 118cc Cylinder Heads (2.19" Int/1.88" Exh valves)1.7:1 Rocker Arms8'' Harmonic Balancer14'' FlexplateRecommended spark plug: Accel #111-263 or any spark plug with 14mm, .460'' reach, 5/8'' hex, tapered seat, non-projected tipWarranty Information
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