Description
Engine Specifications:
• HP: 230
• TQ: 325
• Block: Seasoned OE non roller block
• Bore/Stroke: up to 4.060” x 3.000”
• Displacement: 302CI
• Crankshaft: OE 1 piece seal external balance 50oz
• Rods: OE powder metal
• Pistons: Cast aluminum 8.6:1 compression
• Rings: Moly
• Camshaft: Hyd. flat tappet
• Cam Specs: 192/183 @ 50 .380/.395 111LSA
• Timing Chain: Double roller
• Cylinder Heads: OE E5TE/E7TE 62cc 1.77/1.46
• Rocker Arms: Stamped steel 1.6 pedestal mount rockers
• Oil Pan: Rear Sump Truck
• Oil Pump: Melling standard volume
• Balancer: External balance 50oz
• Flexplate/Flywheel: External balance 50oz 164 tooth
• Intake Manifold: ATK dual plane intake
• Distributor: HEI (Iron gear) (may not clear OE air cleaners/monte carlo bar)
• Water Pump: Early RH inlet standard rotation
• Carburetor: Holley 600cfm electric choke vacuum secondary’s #0-80457SA
• Fuel Pump: Mechanical 80GPH
• Spark Plugs: Autolite #24
• Spark Plug Wires: 8mm
Engine Info:
• Oil: Conventional / Non Synthetic 10W30 with Comp Cam zinc additive #159 for first 3000 miles
• Oil Filter: Wix or K&N
• Timing: 34-36 Degrees with vacuum port plugged on carburetor
• Spark Plug Gap: .035”
• Firing Order: 15426378
• Octane: 91+
• Stall Converter: Stock
• Exhaust: 1 5/8 Headers
Notes: This engine does not have a manual transmission boss for the clutch.
Disclaimer: The parts listed are ATK’s recommendations of parts to be used to obtain our power figures listed. Power figures can vary based on parts used by the end user. It is the customer’s responsibility to verify components will work for their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. ATK reserves the right to substitute parts used in engines if necessary.
| KEY SPECS | |
|---|---|
| MFG. Part # | HP99FT |
| Brand | ATK Engines |
| Engine Displacement | 302 cu. in. |
| Horsepower | 230 horsepower |
| Compression Ratio | 8.5:1 |
| Torque | 300 ft./lbs. |
| Camshaft Type | Hydraulic Flat Tappet |
| Cylinder Head Material | Cast Iron |
| Piston Material | Hypereutectic Aluminum |
| Crankshaft Material | Cast Iron |
| Bore x Stroke (in) | 4.060″ x 3.000″ |
| Carburetor Included | Yes |
| Intake Manifold Included | Yes |
| Distributor Included | Yes |
| Connecting Rod Material | Steel |
| Valve Covers Included | Yes |
| Engine Balance | External |
| Cylinder Heads Included | Yes |
| Rear Main Seal Style | 1-piece |
| Oil Pan Included | Yes |
| Timing Cover Included | Yes |
| Water Pump Included | Yes |
| Harmonic Balancer Included | Yes |
| Flexplate Included | Yes |
| Air Cleaner Included | No |
| Spark Plugs Included | Yes |
| Spark Plug Wires Included | Yes |
| Recommended Fuel | 87 Octane |







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