This is a fresh, never-fired 491 CID Big Block Chevy meticulously machined and assembled by Randy Cassels. If you know the Georgia/North Florida racing scene, you know the quality and reliability of a Cassels’ build. This engine is estimated to produce approximately 800 Horsepower—a true powerhouse ready for your drag car, high-performance street machine, or jet boat.
Specs:
- GM factory 4 bolt main Mark IV 454 block
- Compression 10.57:1
- 491 Cubic Inches
- 4.290” Bore (.040” Over)
- 4.250” Stroke
- Tight Lash Solid Roller Cam
- Pump Gas - 93 Octane
- Randy estimated that it would produce “About 800 HP”
Machine Work:
- Fully Blueprinted and Assembled by Randy Cassels
- Align Honed Block with ARP Main Studs
- Bored and Honed Cylinders with Torque Plate - “Race Finish” so no break-in required
- Squared and Zero Decked Block
- Grooved and Honed Lifter Bores
- Clearanced and Deburr Block for Stroker Crank
- Balanced Crankshaft and Rotating Assembly
- Port Matched Intake Manifold
- Lapped Valves and Checked Spring Heights on AFR Heads
Parts:
- No expense spared on parts: Over $16K Invested and prices have continued to climb
- Air Flow Research, 315cc Fully CNC Machined, with titanium retainers & Inconel exhuast valves - $4976
- Jesel Sportman Series shaft mounted Rocker Arms - $1765
- Morel Mechanical Roller Lifters - $1022
- Trend Pushrods $351
- Cam Motion custom low-lash solid roller - $575
- Lift: 0.720" in / 0.700" exh
- Duration: 258 deg in / 266 deg exh @ .050"
- LSA: 110, ICL: 106, Lash: 0.003" (Set Cold)
- Callies Compstar Crankshaft (4.25" stroke) & Rods (6.385" length) - ($1050 & $824)
- ATI Damper & Flex Plate - ($412 & $250)
- Race Tec custom forged Pistons (4032 Alloy) - $1053
- 4.290" with 27cc Dome
- Hastings Rings, Ductile, Plasma Moly - $ 331
- Edelbrock Victor Jr. (Port Matched) - $476
- Clevite Bearings
- ARP Studs through out
- Moroso Pan and Pump
All paper work is included
Please Email or message with questions and offers
Adam
