Cummins Engine Swap Kits

CMW Trucks - 1947 - 1972 Chevy Truck Parts


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Fast Burn 385 Turn-Key - Hot aluminum heads collaborate with a cool small-block V-8

GM Performance Parts designed our Fast Burn aluminum performance cylinder heads for small-block applications just like our Fast Burn 385 turn-key crate engine. Engineered to meet the demands of a hungry small-block with an aggressive camshaft, the Fast Burn cylinder heads are the featured component on this awesome small-block Chevy crate engine that blends the ZZ4 350 short block with the latest in cylinder head technology. With this hot, new turn-key option, all you need to do is install it, add the fuel, add 12V power, and go start some trouble.

Rated at 385 horsepower and 385 lb.-ft. of torque, the Fast Burn 385 is all ZZ4 inside the crank case including the forged steel crankshaft, hypereutectic pistons, and steel hydraulic roller camshaft. Thanks to a set of the GM Performance Parts Fast Burn cylinder heads, that same short block breathes deeper and more efficiently than ever. These heads have the exclusive Fast Burn combustion chamber design to maximize the efficiency of burning the air/fuel mixture more quickly and completely—resulting in an impressive increase in power.

The Fast Burn 385 Turn-Key is delivered to you with an aluminum dual-plane water intake manifold, HEI distributor, cast iron water pump, damper, and flexplate. It also includes an accessory drive package, fuel pump, chrome air cleaner kit, Holley 750-cfm carburetor, starter, and spark plug wires. That’s a lot of horsepower in one box—we hope you can handle it!

Possible Applications

  • Replace that iron-headed original
  • Make that show car a little faster than you first planned
  • Take it drag racing and see what happens

*Applications have not been validated. They are merely suggestions of how you might enjoy your GM Performance Parts crate engine. Some applications may affect engine warranty. See specific warranty information. Some applications may not be emission legal; check state and local ordinances.

Part Number: 12499710
Engine type: Chevy small-block V-8
Displacement (cu in): 350
Bore x stroke (in): 4.00 x 3.48
Block (P/N 10105123): Cast iron with 4-bolt main caps
Crankshaft (P/N 12556307): Forged steel
Connecting rods (P/N 10108688): Powdered metal steel
Pistons (P/N 10159436): Hypereutectic aluminum
Camshaft type (P/N 10185071): Hydraulic roller
Camshaft lift (in): .474 intake / .510 exhaust
Camshaft duration (@.050 in): 208'c1 intake / 221'c1 exhaust
Cylinder heads (P/N 12464298): Fast Burn aluminum; 62cc chambers
Valve size (in): 2.00 intake / 1.55 exhaust
Compression ratio: 9.6:1
Rocker Arms (P/N 10089648): stamped steel
Rocker arm ratio: 1.5:1
Recommended fuel: 92 octane
Ignition timing: 32'c1 total @ 4000 rpm with vacuum advance disconnected
Maximum rpm: 5800

Chevy Performance Fast Burn 385 engine image

Part #:12499710

Fast Burn 385 dyno image

Installation Notes

  • NOTE: Distributor with melonized steel gear MUST be used with long blocks and partial engines with steel camshafts, or engine damage will occur.
  • Comes with 12.75" externally balanced automatic transmission flexplate; change to externally balanced flywheel for manual transmission applications. See chart on page 171.
  • Intended for pre-1977 street vehicles or all off-road vehicles.
  • Not intended for marine use.
  • Requires fuel line from fuel pump to carburetor.
  • Fuel pump pressure is pre-set, fuel pressure regulator not required.
  • Some assembly required.