orklc
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I acquired a NA L28 ($50) with the F54 Block stamping and a P90A Head, the pistons were dished but it had a NA set of intake and exhaust manifolds. Is this a turbo engine converted to NA or is it possible that Nissan produced F54/P90A combinations for non-turbo applications with dished pistons? Are the internals any different between NA and turbo in this combination? My main concern is the pistons capabilities to withstand 8-12 pounds of boost.