Re: Late 512 blocks
When viewing the cylinder case (engine block) from the bottom, if the cylinder bores have large reliefs at the bottom, that engine case (block) was designed for a 454. Those reliefs are for clearance with the quarter inch longer stroke crankshaft used in 454 applications.
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2 1971 LS-6 Corvette coupes (Duntov's last stand)
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