602 Crate Engine – Chevrolet Performance Dressed CT350 602D2 Sealed Crate Engine Dyno-Tested


  • NKG Plugs and  Sleeved Moroso Wires Installed
  • Valve Lash set and Timing sweep for maximum Performance
  • Camshaft is Broken-In and Piston Rings are Seated
  • Dyno-verified Horsepower and Torque

Shipping is free, but there is a delivery fee for residential addresses.

SKU: 19434602D2 Category:

CT350 602 Crate Engine

The Chevrolet Performance CT350 circle track crate engine delivers competitive and durable power at an economical price. Karl Kustoms is now offering them as a dyno-verified package that is ready to race! Designed for circle track’s weekend warriors, this bullet-proof 350-horsepower, 350-cubic-inch IMCA-sealed racing crate engine (often referred to as the “602 crate”) is a tough combination of power and reliability – and it fits almost any racing budget.

Based on GM Performance Part’s popular 350 HO engine, the CT350 includes:

  • A brand-new four-bolt main block
  • 9.12:1 hypereutectic pistons
  • NEW!! Forged Steel crankshaft
  • GM iron Vortec cylinder heads
  • A high-rise dual-plane intake manifold
  • 8-quart single kick-out circle track oil pan
  • Valve cover kit with breather tube and breather
  • A special “kool nut” rocker arm nut design
  • HEI distributor, spark plugs and wires

The 350 HO’s unique dual-pattern cam is included, too. It’s based on the one found in 1965-67 Corvette 327 engines, but with more lift and duration to clear the engine exhaust quickly and move more air – providing excellent mid- and high-range power, where you need it on the track.

What’s Included

  • Fully GM assembled Long Block
  • Steel Valve Covers with Chevy Bowtie Logo Breathers
  • High Rise Aluminum Intake Manifold
  • HEI Distributor
  • NGK Spark Plugs
  • Moroso Mag-tune sleeved, under-header wire kit (terminals installed)
  • 8″ Harmonic Balancer
  • Oil Pump, Pick-up and 8-Quart Oil Pan
  • Front Timing Cover
  • IMCA-issued seals professionally installed
  • Dyno Sheet of your Engine

Important Notes

  • Requires the addition of a carburetor, starter and water pump (not included).
  • Requires an externally balanced flywheel (not included).
  • The 8-quart Circle Track oil pan is 7 inches deep at the sump. It will clear most GM rear-steer chassis with the stock engine location.
  • For Circle Track Racing only – not intended for street use.
  • Broken-in, dyno-verified HP/TQ, and IMCA-sealed for competition. Includes distributor (installed and timed) and fitted spark plug wires.
  • This item is made to order. It will be shipped from our warehouse when it is produced.
Weight 451 lbs

19431602D2, 19432602D2


CT350/602 Tech Specs

  • Engine Type: Deluxe Crate Engine
  • Displacement (cu in): 350
  • Bore x Stroke (in): 4.000 x 3.480
  • Block: Cast-iron with 4-bolt main caps (P/N 12691718)
  • Crankshaft: Forged Steel (P/N 12691722)
  • Connecting Rods: Powdered metal steel (P/N 10108688)
  • Pistons: Hypereutectic aluminum (P/N 88894280)
  • Intake Manifold: Dual-plane aluminum (P/N 12366573)
  • Camshaft Type: Hydraulic flat tappet (P/N 24502476)
  • Camshaft Lift (in): .435 intake / .460 exhaust
  • Camshaft Duration (@.050 in): 208° intake / 221° exhaust
  • Cylinder Heads: Vortec iron; 64cc chambers (P/N 12558060)
  • Valve Size (in): 1.940 intake / 1.500 exhaust
  • Compression Ratio: 9.1:1
  • Rocker Arms: Stamped steel (P/N 10089648)
  • Rocker Arm Ratio: 1.5:1
  • Recommended Fuel: 92 octane premium pump
  • Ignition Timing: 34° Total @ 4,000 rpm
  • Maximum Recommended rpm: 5,500
  • Balanced: External



Click here to download installation information.

Chevrolet Performance Crate Engines carry a 24 Month or 50,000 mile warranty (whichever comes first) when installed by a qualified independent service center. Chevrolet Performance Crate Engines also come with a 30 day start up warranty (parts only).

There are some additional limitations on the warranty – please see the official GM warranty documentation for more information.


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Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to