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182 Posts
Discussion Starter #1
GM Performance Parts ZZ383 Crate Engine


Horsepower: 425 @ 5400 RPM
Torque: 460 lb-ft @ 4500 RPM
Compression Ratio: 9.7:1
Block: Cast Iron, 4-Bolt Main, 1-piece rear main seal
Crankshaft: Forged 4340 Steel, Externally Balanced
Connecting Rod: Powdered Metal (Special ''383'' Version)
Pistons: Hypereutectic Flat top with offset pins
Camshaft: hydraulic roller, 222°/230° @ .050'', .509''/.528'' lift, 112° centerlobe
Cylinder Heads: Aluminum Fast Burn 62cc chamber, 210cc intake runners, 2.00'' hollow stem intake/1.55'' sodium filled exhaust valves, LT4 Corvette valve springs and lightweight retainers, D-shaped exhaust ports and dual intake manifold bolt pattern and standard & center bolt valve cover paterns
Rockers: 1.5:1 Aluminum full roller, self-aligning
Water Pump: Cast iron, Long style, standard V-Belt rotation with 1979-86 power steering pump boss
Additional Parts Included:

8'' balancer
12-3/4'' automatic flexplate
4-quart oil pan with windage tray (5-Quart capacity with PF35 filter)
Painted valve covers with oil cap, and grommets, provisions for PCV breather
Composite (plastic) Front timing cover
Spark plugs
Engine oil dipstick and tube - passenger side location
Brass freeze plugs
Fuel pump block off plate
Engine lift tabs

'20 gray crewcab 4x4; sold '09 access cab 4x4, '94 T100 4x4, '85 4x4, '82 2x4 pickup
490 Posts
I'm sure it would fit quite well in the bed.:) With those hp and torque specs I'd be concerned about the drivetrain holding up if swapped for the stock engine.
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