302 V8 ENGINES

Reference the Chart below to Assist you in Purchasing the Engine that best fits your Needs!

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302 / 275 HP 302 / 350 HP 302 / 373 HP 331 / 400 HP 347 / 415 HP
Idle Quality Smooth Good Fair Fair Fair
Octane Gas Suggested 89 octane & Up 89 Octane & Up 91 Octane & Up 92 Octane & Up 92 Octane & Up
Power Band Range Idle to 5500 1500 to 5500 2000 to 5800 2200 to 6200 2200 to 6200
Transmission Upgrades None Optional Suggested Suggested Suggested

Torque Converter Stall Speed for Auto Trans.

Stock 1800-2000 2200-2400 2200-2400 2200-2400
Exhaust Header Size 1 5/8 1 5/8 1 5/8 1 5/8 to 1 3/4 1 5/8 to 1 3/4
Engine RPM Redline 5500 5500 5800 6200 6200
Rear End Ratio 3.25 to 3.73 3.55 to 3.73  3.55 to 4.11 3.55 to 4.11 3.55 to 4.11
289 or 302 Will Interchange YES YES YES YES YES
Can Be Used for a Daily Driver YES YES YES YES YES

 

This is a General List of suggestions. Some Exceptions will apply based on the vehicle Type & Usage.

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