Chevy offered a 400, the largest small block. Mopar had a 400, the largest B- Block. Ford also sold a 400 M which was a low compression replacement of the Cleveland engines. Ford sold 3 varieties of the 351. The 351 M was a short stroke version of the 400 M. Then also 351 Windsor and 351 Cleveland. Mopar and AMC offered 360 engines.
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