SB Chevy 383 Marine Engine - 375 Horsepower with Vortec Heads

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380+ Horsepower Marine SB Chevy 383 Stroker Engine with Vortec Heads

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BluePrint Engines BP35512CT1 BluePrint Engines GM 355 C.I.D. 375 HP Base Long Block Crate Engines with Aluminum Cylinder Heads

Long Rod Chevy 307 = Big Power

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GM 383 Dressed Engine Aluminum Heads Roller Cam HP & Torque: 430 HP / 450 FT LBS - American Powertrain - TREMEC Conversion Specialists

Easy 550-Plus Horsepower Chevy Build (Naturally Aspirated!)