The LQ4 6.0L iron block is the best budget LS engine for street builds — find one for under $1,000 and build serious power.

All sorts of cars have seen their engines replaced by General Motors' LS small block. Now some enthusiasts are even swapping them into airplanes.

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Ever since Chevrolet started putting LS series engines in the Corvette and Camaro in the late '90s, the durable LS engines have become quite popular for engine swaps. Their six-bolt main bearing caps ...